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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/metrics/metrics_log.h"
      6 
      7 #include <algorithm>
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/base64.h"
     12 #include "base/basictypes.h"
     13 #include "base/bind.h"
     14 #include "base/cpu.h"
     15 #include "base/lazy_instance.h"
     16 #include "base/memory/scoped_ptr.h"
     17 #include "base/prefs/pref_registry_simple.h"
     18 #include "base/prefs/pref_service.h"
     19 #include "base/profiler/alternate_timer.h"
     20 #include "base/sha1.h"
     21 #include "base/strings/string_number_conversions.h"
     22 #include "base/strings/string_util.h"
     23 #include "base/strings/utf_string_conversions.h"
     24 #include "base/sys_info.h"
     25 #include "base/third_party/nspr/prtime.h"
     26 #include "base/time/time.h"
     27 #include "base/tracked_objects.h"
     28 #include "chrome/browser/autocomplete/autocomplete_input.h"
     29 #include "chrome/browser/autocomplete/autocomplete_match.h"
     30 #include "chrome/browser/autocomplete/autocomplete_provider.h"
     31 #include "chrome/browser/autocomplete/autocomplete_result.h"
     32 #include "chrome/browser/browser_process.h"
     33 #include "chrome/browser/google/google_util.h"
     34 #include "chrome/browser/omnibox/omnibox_log.h"
     35 #include "chrome/browser/plugins/plugin_prefs.h"
     36 #include "chrome/browser/profiles/profile_manager.h"
     37 #include "chrome/common/chrome_version_info.h"
     38 #include "chrome/common/logging_chrome.h"
     39 #include "chrome/common/metrics/proto/omnibox_event.pb.h"
     40 #include "chrome/common/metrics/proto/profiler_event.pb.h"
     41 #include "chrome/common/metrics/proto/system_profile.pb.h"
     42 #include "chrome/common/metrics/variations/variations_util.h"
     43 #include "chrome/common/pref_names.h"
     44 #include "chrome/installer/util/google_update_settings.h"
     45 #include "components/nacl/common/nacl_process_type.h"
     46 #include "content/public/browser/gpu_data_manager.h"
     47 #include "content/public/common/content_client.h"
     48 #include "content/public/common/webplugininfo.h"
     49 #include "device/bluetooth/bluetooth_adapter.h"
     50 #include "device/bluetooth/bluetooth_adapter_factory.h"
     51 #include "device/bluetooth/bluetooth_device.h"
     52 #include "gpu/config/gpu_info.h"
     53 #include "ui/gfx/screen.h"
     54 #include "url/gurl.h"
     55 
     56 #if defined(OS_ANDROID)
     57 #include "base/android/build_info.h"
     58 #endif
     59 
     60 #if defined(OS_WIN)
     61 #include "base/win/metro.h"
     62 
     63 // http://blogs.msdn.com/oldnewthing/archive/2004/10/25/247180.aspx
     64 extern "C" IMAGE_DOS_HEADER __ImageBase;
     65 #endif
     66 
     67 #if defined(OS_CHROMEOS)
     68 #include "chrome/browser/chromeos/login/user_manager.h"
     69 #endif
     70 
     71 using content::GpuDataManager;
     72 using metrics::OmniboxEventProto;
     73 using metrics::PerfDataProto;
     74 using metrics::ProfilerEventProto;
     75 using metrics::SystemProfileProto;
     76 using tracked_objects::ProcessDataSnapshot;
     77 typedef chrome_variations::ActiveGroupId ActiveGroupId;
     78 typedef SystemProfileProto::GoogleUpdate::ProductInfo ProductInfo;
     79 typedef SystemProfileProto::Hardware::Bluetooth::PairedDevice PairedDevice;
     80 
     81 namespace {
     82 
     83 // Returns the date at which the current metrics client ID was created as
     84 // a string containing seconds since the epoch, or "0" if none was found.
     85 std::string GetMetricsEnabledDate(PrefService* pref) {
     86   if (!pref) {
     87     NOTREACHED();
     88     return "0";
     89   }
     90 
     91   return pref->GetString(prefs::kMetricsClientIDTimestamp);
     92 }
     93 
     94 OmniboxEventProto::InputType AsOmniboxEventInputType(
     95     AutocompleteInput::Type type) {
     96   switch (type) {
     97     case AutocompleteInput::INVALID:
     98       return OmniboxEventProto::INVALID;
     99     case AutocompleteInput::UNKNOWN:
    100       return OmniboxEventProto::UNKNOWN;
    101     case AutocompleteInput::URL:
    102       return OmniboxEventProto::URL;
    103     case AutocompleteInput::QUERY:
    104       return OmniboxEventProto::QUERY;
    105     case AutocompleteInput::FORCED_QUERY:
    106       return OmniboxEventProto::FORCED_QUERY;
    107     default:
    108       NOTREACHED();
    109       return OmniboxEventProto::INVALID;
    110   }
    111 }
    112 
    113 OmniboxEventProto::Suggestion::ResultType AsOmniboxEventResultType(
    114     AutocompleteMatch::Type type) {
    115   switch (type) {
    116     case AutocompleteMatchType::URL_WHAT_YOU_TYPED:
    117       return OmniboxEventProto::Suggestion::URL_WHAT_YOU_TYPED;
    118     case AutocompleteMatchType::HISTORY_URL:
    119       return OmniboxEventProto::Suggestion::HISTORY_URL;
    120     case AutocompleteMatchType::HISTORY_TITLE:
    121       return OmniboxEventProto::Suggestion::HISTORY_TITLE;
    122     case AutocompleteMatchType::HISTORY_BODY:
    123       return OmniboxEventProto::Suggestion::HISTORY_BODY;
    124     case AutocompleteMatchType::HISTORY_KEYWORD:
    125       return OmniboxEventProto::Suggestion::HISTORY_KEYWORD;
    126     case AutocompleteMatchType::NAVSUGGEST:
    127       return OmniboxEventProto::Suggestion::NAVSUGGEST;
    128     case AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED:
    129       return OmniboxEventProto::Suggestion::SEARCH_WHAT_YOU_TYPED;
    130     case AutocompleteMatchType::SEARCH_HISTORY:
    131       return OmniboxEventProto::Suggestion::SEARCH_HISTORY;
    132     case AutocompleteMatchType::SEARCH_SUGGEST:
    133       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST;
    134     case AutocompleteMatchType::SEARCH_SUGGEST_ENTITY:
    135       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST_ENTITY;
    136     case AutocompleteMatchType::SEARCH_SUGGEST_INFINITE:
    137       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST_INFINITE;
    138     case AutocompleteMatchType::SEARCH_SUGGEST_PERSONALIZED:
    139       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST_PERSONALIZED;
    140     case AutocompleteMatchType::SEARCH_SUGGEST_PROFILE:
    141       return OmniboxEventProto::Suggestion::SEARCH_SUGGEST_PROFILE;
    142     case AutocompleteMatchType::SEARCH_OTHER_ENGINE:
    143       return OmniboxEventProto::Suggestion::SEARCH_OTHER_ENGINE;
    144     case AutocompleteMatchType::EXTENSION_APP:
    145       return OmniboxEventProto::Suggestion::EXTENSION_APP;
    146     case AutocompleteMatchType::CONTACT:
    147       return OmniboxEventProto::Suggestion::CONTACT;
    148     case AutocompleteMatchType::BOOKMARK_TITLE:
    149       return OmniboxEventProto::Suggestion::BOOKMARK_TITLE;
    150     default:
    151       NOTREACHED();
    152       return OmniboxEventProto::Suggestion::UNKNOWN_RESULT_TYPE;
    153   }
    154 }
    155 
    156 OmniboxEventProto::PageClassification AsOmniboxEventPageClassification(
    157     AutocompleteInput::PageClassification page_classification) {
    158   switch (page_classification) {
    159     case AutocompleteInput::INVALID_SPEC:
    160       return OmniboxEventProto::INVALID_SPEC;
    161     case AutocompleteInput::NTP:
    162       return OmniboxEventProto::NTP;
    163     case AutocompleteInput::BLANK:
    164       return OmniboxEventProto::BLANK;
    165     case AutocompleteInput::HOME_PAGE:
    166       return OmniboxEventProto::HOME_PAGE;
    167     case AutocompleteInput::OTHER:
    168       return OmniboxEventProto::OTHER;
    169     case AutocompleteInput::SEARCH_RESULT_PAGE_DOING_SEARCH_TERM_REPLACEMENT:
    170       return OmniboxEventProto::
    171           SEARCH_RESULT_PAGE_DOING_SEARCH_TERM_REPLACEMENT;
    172     case AutocompleteInput::INSTANT_NTP_WITH_OMNIBOX_AS_STARTING_FOCUS:
    173       return OmniboxEventProto::INSTANT_NTP_WITH_OMNIBOX_AS_STARTING_FOCUS;
    174     case AutocompleteInput::INSTANT_NTP_WITH_FAKEBOX_AS_STARTING_FOCUS:
    175       return OmniboxEventProto::INSTANT_NTP_WITH_FAKEBOX_AS_STARTING_FOCUS;
    176     case AutocompleteInput::SEARCH_RESULT_PAGE_NO_SEARCH_TERM_REPLACEMENT:
    177       return OmniboxEventProto::
    178           SEARCH_RESULT_PAGE_NO_SEARCH_TERM_REPLACEMENT;
    179   }
    180   return OmniboxEventProto::INVALID_SPEC;
    181 }
    182 
    183 ProfilerEventProto::TrackedObject::ProcessType AsProtobufProcessType(
    184     int process_type) {
    185   switch (process_type) {
    186     case content::PROCESS_TYPE_BROWSER:
    187       return ProfilerEventProto::TrackedObject::BROWSER;
    188     case content::PROCESS_TYPE_RENDERER:
    189       return ProfilerEventProto::TrackedObject::RENDERER;
    190     case content::PROCESS_TYPE_PLUGIN:
    191       return ProfilerEventProto::TrackedObject::PLUGIN;
    192     case content::PROCESS_TYPE_WORKER:
    193       return ProfilerEventProto::TrackedObject::WORKER;
    194     case content::PROCESS_TYPE_UTILITY:
    195       return ProfilerEventProto::TrackedObject::UTILITY;
    196     case content::PROCESS_TYPE_ZYGOTE:
    197       return ProfilerEventProto::TrackedObject::ZYGOTE;
    198     case content::PROCESS_TYPE_SANDBOX_HELPER:
    199       return ProfilerEventProto::TrackedObject::SANDBOX_HELPER;
    200     case content::PROCESS_TYPE_GPU:
    201       return ProfilerEventProto::TrackedObject::GPU;
    202     case content::PROCESS_TYPE_PPAPI_PLUGIN:
    203       return ProfilerEventProto::TrackedObject::PPAPI_PLUGIN;
    204     case content::PROCESS_TYPE_PPAPI_BROKER:
    205       return ProfilerEventProto::TrackedObject::PPAPI_BROKER;
    206     case PROCESS_TYPE_NACL_LOADER:
    207       return ProfilerEventProto::TrackedObject::NACL_LOADER;
    208     case PROCESS_TYPE_NACL_BROKER:
    209       return ProfilerEventProto::TrackedObject::NACL_BROKER;
    210     default:
    211       NOTREACHED();
    212       return ProfilerEventProto::TrackedObject::UNKNOWN;
    213   }
    214 }
    215 
    216 // Computes a SHA-1 hash of |data| and returns it as a hex string.
    217 std::string ComputeSHA1(const std::string& data) {
    218   const std::string sha1 = base::SHA1HashString(data);
    219   return base::HexEncode(sha1.data(), sha1.size());
    220 }
    221 
    222 #if defined(ENABLE_PLUGINS)
    223 // Returns the plugin preferences corresponding for this user, if available.
    224 // If multiple user profiles are loaded, returns the preferences corresponding
    225 // to an arbitrary one of the profiles.
    226 PluginPrefs* GetPluginPrefs() {
    227   ProfileManager* profile_manager = g_browser_process->profile_manager();
    228 
    229   if (!profile_manager) {
    230     // The profile manager can be NULL when testing.
    231     return NULL;
    232   }
    233 
    234   std::vector<Profile*> profiles = profile_manager->GetLoadedProfiles();
    235   if (profiles.empty())
    236     return NULL;
    237 
    238   return PluginPrefs::GetForProfile(profiles.front()).get();
    239 }
    240 
    241 // Fills |plugin| with the info contained in |plugin_info| and |plugin_prefs|.
    242 void SetPluginInfo(const content::WebPluginInfo& plugin_info,
    243                    const PluginPrefs* plugin_prefs,
    244                    SystemProfileProto::Plugin* plugin) {
    245   plugin->set_name(UTF16ToUTF8(plugin_info.name));
    246   plugin->set_filename(plugin_info.path.BaseName().AsUTF8Unsafe());
    247   plugin->set_version(UTF16ToUTF8(plugin_info.version));
    248   plugin->set_is_pepper(plugin_info.is_pepper_plugin());
    249   if (plugin_prefs)
    250     plugin->set_is_disabled(!plugin_prefs->IsPluginEnabled(plugin_info));
    251 }
    252 #endif  // defined(ENABLE_PLUGINS)
    253 
    254 void WriteFieldTrials(const std::vector<ActiveGroupId>& field_trial_ids,
    255                       SystemProfileProto* system_profile) {
    256   for (std::vector<ActiveGroupId>::const_iterator it =
    257        field_trial_ids.begin(); it != field_trial_ids.end(); ++it) {
    258     SystemProfileProto::FieldTrial* field_trial =
    259         system_profile->add_field_trial();
    260     field_trial->set_name_id(it->name);
    261     field_trial->set_group_id(it->group);
    262   }
    263 }
    264 
    265 void WriteProfilerData(const ProcessDataSnapshot& profiler_data,
    266                        int process_type,
    267                        ProfilerEventProto* performance_profile) {
    268   for (std::vector<tracked_objects::TaskSnapshot>::const_iterator it =
    269            profiler_data.tasks.begin();
    270        it != profiler_data.tasks.end(); ++it) {
    271     const tracked_objects::DeathDataSnapshot& death_data = it->death_data;
    272     ProfilerEventProto::TrackedObject* tracked_object =
    273         performance_profile->add_tracked_object();
    274     tracked_object->set_birth_thread_name_hash(
    275         MetricsLogBase::Hash(it->birth.thread_name));
    276     tracked_object->set_exec_thread_name_hash(
    277         MetricsLogBase::Hash(it->death_thread_name));
    278     tracked_object->set_source_file_name_hash(
    279         MetricsLogBase::Hash(it->birth.location.file_name));
    280     tracked_object->set_source_function_name_hash(
    281         MetricsLogBase::Hash(it->birth.location.function_name));
    282     tracked_object->set_source_line_number(it->birth.location.line_number);
    283     tracked_object->set_exec_count(death_data.count);
    284     tracked_object->set_exec_time_total(death_data.run_duration_sum);
    285     tracked_object->set_exec_time_sampled(death_data.run_duration_sample);
    286     tracked_object->set_queue_time_total(death_data.queue_duration_sum);
    287     tracked_object->set_queue_time_sampled(death_data.queue_duration_sample);
    288     tracked_object->set_process_type(AsProtobufProcessType(process_type));
    289     tracked_object->set_process_id(profiler_data.process_id);
    290   }
    291 }
    292 
    293 #if defined(GOOGLE_CHROME_BUILD) && defined(OS_WIN)
    294 void ProductDataToProto(const GoogleUpdateSettings::ProductData& product_data,
    295                         ProductInfo* product_info) {
    296   product_info->set_version(product_data.version);
    297   product_info->set_last_update_success_timestamp(
    298       product_data.last_success.ToTimeT());
    299   product_info->set_last_error(product_data.last_error_code);
    300   product_info->set_last_extra_error(product_data.last_extra_code);
    301   if (ProductInfo::InstallResult_IsValid(product_data.last_result)) {
    302     product_info->set_last_result(
    303         static_cast<ProductInfo::InstallResult>(product_data.last_result));
    304   }
    305 }
    306 #endif
    307 
    308 #if defined(OS_WIN)
    309 struct ScreenDPIInformation {
    310   double max_dpi_x;
    311   double max_dpi_y;
    312 };
    313 
    314 // Called once for each connected monitor.
    315 BOOL CALLBACK GetMonitorDPICallback(HMONITOR, HDC hdc, LPRECT, LPARAM dwData) {
    316   const double kMillimetersPerInch = 25.4;
    317   ScreenDPIInformation* screen_info =
    318       reinterpret_cast<ScreenDPIInformation*>(dwData);
    319   // Size of screen, in mm.
    320   DWORD size_x = GetDeviceCaps(hdc, HORZSIZE);
    321   DWORD size_y = GetDeviceCaps(hdc, VERTSIZE);
    322   double dpi_x = (size_x > 0) ?
    323       GetDeviceCaps(hdc, HORZRES) / (size_x / kMillimetersPerInch) : 0;
    324   double dpi_y = (size_y > 0) ?
    325       GetDeviceCaps(hdc, VERTRES) / (size_y / kMillimetersPerInch) : 0;
    326   screen_info->max_dpi_x = std::max(dpi_x, screen_info->max_dpi_x);
    327   screen_info->max_dpi_y = std::max(dpi_y, screen_info->max_dpi_y);
    328   return TRUE;
    329 }
    330 
    331 void WriteScreenDPIInformationProto(SystemProfileProto::Hardware* hardware) {
    332   HDC desktop_dc = GetDC(NULL);
    333   if (desktop_dc) {
    334     ScreenDPIInformation si = {0, 0};
    335     if (EnumDisplayMonitors(desktop_dc, NULL, GetMonitorDPICallback,
    336             reinterpret_cast<LPARAM>(&si))) {
    337       hardware->set_max_dpi_x(si.max_dpi_x);
    338       hardware->set_max_dpi_y(si.max_dpi_y);
    339     }
    340     ReleaseDC(GetDesktopWindow(), desktop_dc);
    341   }
    342 }
    343 
    344 #endif  // defined(OS_WIN)
    345 
    346 #if defined(OS_CHROMEOS)
    347 PairedDevice::Type AsBluetoothDeviceType(
    348     enum device::BluetoothDevice::DeviceType device_type) {
    349   switch (device_type) {
    350     case device::BluetoothDevice::DEVICE_UNKNOWN:
    351       return PairedDevice::DEVICE_UNKNOWN;
    352     case device::BluetoothDevice::DEVICE_COMPUTER:
    353       return PairedDevice::DEVICE_COMPUTER;
    354     case device::BluetoothDevice::DEVICE_PHONE:
    355       return PairedDevice::DEVICE_PHONE;
    356     case device::BluetoothDevice::DEVICE_MODEM:
    357       return PairedDevice::DEVICE_MODEM;
    358     case device::BluetoothDevice::DEVICE_AUDIO:
    359       return PairedDevice::DEVICE_AUDIO;
    360     case device::BluetoothDevice::DEVICE_CAR_AUDIO:
    361       return PairedDevice::DEVICE_CAR_AUDIO;
    362     case device::BluetoothDevice::DEVICE_VIDEO:
    363       return PairedDevice::DEVICE_VIDEO;
    364     case device::BluetoothDevice::DEVICE_PERIPHERAL:
    365       return PairedDevice::DEVICE_PERIPHERAL;
    366     case device::BluetoothDevice::DEVICE_JOYSTICK:
    367       return PairedDevice::DEVICE_JOYSTICK;
    368     case device::BluetoothDevice::DEVICE_GAMEPAD:
    369       return PairedDevice::DEVICE_GAMEPAD;
    370     case device::BluetoothDevice::DEVICE_KEYBOARD:
    371       return PairedDevice::DEVICE_KEYBOARD;
    372     case device::BluetoothDevice::DEVICE_MOUSE:
    373       return PairedDevice::DEVICE_MOUSE;
    374     case device::BluetoothDevice::DEVICE_TABLET:
    375       return PairedDevice::DEVICE_TABLET;
    376     case device::BluetoothDevice::DEVICE_KEYBOARD_MOUSE_COMBO:
    377       return PairedDevice::DEVICE_KEYBOARD_MOUSE_COMBO;
    378   }
    379 
    380   NOTREACHED();
    381   return PairedDevice::DEVICE_UNKNOWN;
    382 }
    383 #endif  // defined(OS_CHROMEOS)
    384 
    385 // Round a timestamp measured in seconds since epoch to one with a granularity
    386 // of an hour. This can be used before uploaded potentially sensitive
    387 // timestamps.
    388 int64 RoundSecondsToHour(int64 time_in_seconds) {
    389   return 3600 * (time_in_seconds / 3600);
    390 }
    391 
    392 }  // namespace
    393 
    394 GoogleUpdateMetrics::GoogleUpdateMetrics() : is_system_install(false) {}
    395 
    396 GoogleUpdateMetrics::~GoogleUpdateMetrics() {}
    397 
    398 static base::LazyInstance<std::string>::Leaky
    399     g_version_extension = LAZY_INSTANCE_INITIALIZER;
    400 
    401 MetricsLog::MetricsLog(const std::string& client_id, int session_id)
    402     : MetricsLogBase(client_id, session_id, MetricsLog::GetVersionString()),
    403       creation_time_(base::TimeTicks::Now()) {
    404 #if defined(OS_CHROMEOS)
    405   UpdateMultiProfileUserCount();
    406 #endif
    407 }
    408 
    409 MetricsLog::~MetricsLog() {}
    410 
    411 // static
    412 void MetricsLog::RegisterPrefs(PrefRegistrySimple* registry) {
    413   registry->RegisterListPref(prefs::kStabilityPluginStats);
    414 }
    415 
    416 // static
    417 std::string MetricsLog::GetVersionString() {
    418   chrome::VersionInfo version_info;
    419   if (!version_info.is_valid()) {
    420     NOTREACHED() << "Unable to retrieve version info.";
    421     return std::string();
    422   }
    423 
    424   std::string version = version_info.Version();
    425   if (!version_extension().empty())
    426     version += version_extension();
    427   if (!version_info.IsOfficialBuild())
    428     version.append("-devel");
    429   return version;
    430 }
    431 
    432 // static
    433 void MetricsLog::set_version_extension(const std::string& extension) {
    434   g_version_extension.Get() = extension;
    435 }
    436 
    437 // static
    438 const std::string& MetricsLog::version_extension() {
    439   return g_version_extension.Get();
    440 }
    441 
    442 void MetricsLog::RecordStabilityMetrics(
    443     base::TimeDelta incremental_uptime,
    444     LogType log_type) {
    445   DCHECK_NE(NO_LOG, log_type);
    446   DCHECK(!locked());
    447   DCHECK(HasEnvironment());
    448   DCHECK(!HasStabilityMetrics());
    449 
    450   PrefService* pref = GetPrefService();
    451   DCHECK(pref);
    452 
    453   // Get stability attributes out of Local State, zeroing out stored values.
    454   // NOTE: This could lead to some data loss if this report isn't successfully
    455   //       sent, but that's true for all the metrics.
    456 
    457   WriteRequiredStabilityAttributes(pref);
    458   WritePluginStabilityElements(pref);
    459 
    460   // Record recent delta for critical stability metrics.  We can't wait for a
    461   // restart to gather these, as that delay biases our observation away from
    462   // users that run happily for a looooong time.  We send increments with each
    463   // uma log upload, just as we send histogram data.
    464   WriteRealtimeStabilityAttributes(pref, incremental_uptime);
    465 
    466   // Omit some stats unless this is the initial stability log.
    467   if (log_type != INITIAL_LOG)
    468     return;
    469 
    470   int incomplete_shutdown_count =
    471       pref->GetInteger(prefs::kStabilityIncompleteSessionEndCount);
    472   pref->SetInteger(prefs::kStabilityIncompleteSessionEndCount, 0);
    473   int breakpad_registration_success_count =
    474       pref->GetInteger(prefs::kStabilityBreakpadRegistrationSuccess);
    475   pref->SetInteger(prefs::kStabilityBreakpadRegistrationSuccess, 0);
    476   int breakpad_registration_failure_count =
    477       pref->GetInteger(prefs::kStabilityBreakpadRegistrationFail);
    478   pref->SetInteger(prefs::kStabilityBreakpadRegistrationFail, 0);
    479   int debugger_present_count =
    480       pref->GetInteger(prefs::kStabilityDebuggerPresent);
    481   pref->SetInteger(prefs::kStabilityDebuggerPresent, 0);
    482   int debugger_not_present_count =
    483       pref->GetInteger(prefs::kStabilityDebuggerNotPresent);
    484   pref->SetInteger(prefs::kStabilityDebuggerNotPresent, 0);
    485 
    486   // TODO(jar): The following are all optional, so we *could* optimize them for
    487   // values of zero (and not include them).
    488   SystemProfileProto::Stability* stability =
    489       uma_proto()->mutable_system_profile()->mutable_stability();
    490   stability->set_incomplete_shutdown_count(incomplete_shutdown_count);
    491   stability->set_breakpad_registration_success_count(
    492       breakpad_registration_success_count);
    493   stability->set_breakpad_registration_failure_count(
    494       breakpad_registration_failure_count);
    495   stability->set_debugger_present_count(debugger_present_count);
    496   stability->set_debugger_not_present_count(debugger_not_present_count);
    497 }
    498 
    499 PrefService* MetricsLog::GetPrefService() {
    500   return g_browser_process->local_state();
    501 }
    502 
    503 gfx::Size MetricsLog::GetScreenSize() const {
    504   return gfx::Screen::GetNativeScreen()->GetPrimaryDisplay().GetSizeInPixel();
    505 }
    506 
    507 float MetricsLog::GetScreenDeviceScaleFactor() const {
    508   return gfx::Screen::GetNativeScreen()->
    509       GetPrimaryDisplay().device_scale_factor();
    510 }
    511 
    512 int MetricsLog::GetScreenCount() const {
    513   // TODO(scottmg): NativeScreen maybe wrong. http://crbug.com/133312
    514   return gfx::Screen::GetNativeScreen()->GetNumDisplays();
    515 }
    516 
    517 void MetricsLog::GetFieldTrialIds(
    518     std::vector<ActiveGroupId>* field_trial_ids) const {
    519   chrome_variations::GetFieldTrialActiveGroupIds(field_trial_ids);
    520 }
    521 
    522 bool MetricsLog::HasEnvironment() const {
    523   return uma_proto()->system_profile().has_uma_enabled_date();
    524 }
    525 
    526 bool MetricsLog::HasStabilityMetrics() const {
    527   return uma_proto()->system_profile().stability().has_launch_count();
    528 }
    529 
    530 void MetricsLog::WritePluginStabilityElements(PrefService* pref) {
    531   // Now log plugin stability info.
    532   const ListValue* plugin_stats_list = pref->GetList(
    533       prefs::kStabilityPluginStats);
    534   if (!plugin_stats_list)
    535     return;
    536 
    537 #if defined(ENABLE_PLUGINS)
    538   SystemProfileProto::Stability* stability =
    539       uma_proto()->mutable_system_profile()->mutable_stability();
    540   for (ListValue::const_iterator iter = plugin_stats_list->begin();
    541        iter != plugin_stats_list->end(); ++iter) {
    542     if (!(*iter)->IsType(Value::TYPE_DICTIONARY)) {
    543       NOTREACHED();
    544       continue;
    545     }
    546     DictionaryValue* plugin_dict = static_cast<DictionaryValue*>(*iter);
    547 
    548     // Note that this search is potentially a quadratic operation, but given the
    549     // low number of plugins installed on a "reasonable" setup, this should be
    550     // fine.
    551     // TODO(isherman): Verify that this does not show up as a hotspot in
    552     // profiler runs.
    553     const SystemProfileProto::Plugin* system_profile_plugin = NULL;
    554     std::string plugin_name;
    555     plugin_dict->GetString(prefs::kStabilityPluginName, &plugin_name);
    556     const SystemProfileProto& system_profile = uma_proto()->system_profile();
    557     for (int i = 0; i < system_profile.plugin_size(); ++i) {
    558       if (system_profile.plugin(i).name() == plugin_name) {
    559         system_profile_plugin = &system_profile.plugin(i);
    560         break;
    561       }
    562     }
    563 
    564     if (!system_profile_plugin) {
    565       NOTREACHED();
    566       continue;
    567     }
    568 
    569     SystemProfileProto::Stability::PluginStability* plugin_stability =
    570         stability->add_plugin_stability();
    571     *plugin_stability->mutable_plugin() = *system_profile_plugin;
    572 
    573     int launches = 0;
    574     plugin_dict->GetInteger(prefs::kStabilityPluginLaunches, &launches);
    575     if (launches > 0)
    576       plugin_stability->set_launch_count(launches);
    577 
    578     int instances = 0;
    579     plugin_dict->GetInteger(prefs::kStabilityPluginInstances, &instances);
    580     if (instances > 0)
    581       plugin_stability->set_instance_count(instances);
    582 
    583     int crashes = 0;
    584     plugin_dict->GetInteger(prefs::kStabilityPluginCrashes, &crashes);
    585     if (crashes > 0)
    586       plugin_stability->set_crash_count(crashes);
    587 
    588     int loading_errors = 0;
    589     plugin_dict->GetInteger(prefs::kStabilityPluginLoadingErrors,
    590                             &loading_errors);
    591     if (loading_errors > 0)
    592       plugin_stability->set_loading_error_count(loading_errors);
    593   }
    594 #endif  // defined(ENABLE_PLUGINS)
    595 
    596   pref->ClearPref(prefs::kStabilityPluginStats);
    597 }
    598 
    599 // The server refuses data that doesn't have certain values.  crashcount and
    600 // launchcount are currently "required" in the "stability" group.
    601 // TODO(isherman): Stop writing these attributes specially once the migration to
    602 // protobufs is complete.
    603 void MetricsLog::WriteRequiredStabilityAttributes(PrefService* pref) {
    604   int launch_count = pref->GetInteger(prefs::kStabilityLaunchCount);
    605   pref->SetInteger(prefs::kStabilityLaunchCount, 0);
    606   int crash_count = pref->GetInteger(prefs::kStabilityCrashCount);
    607   pref->SetInteger(prefs::kStabilityCrashCount, 0);
    608 
    609   SystemProfileProto::Stability* stability =
    610       uma_proto()->mutable_system_profile()->mutable_stability();
    611   stability->set_launch_count(launch_count);
    612   stability->set_crash_count(crash_count);
    613 }
    614 
    615 void MetricsLog::WriteRealtimeStabilityAttributes(
    616     PrefService* pref,
    617     base::TimeDelta incremental_uptime) {
    618   // Update the stats which are critical for real-time stability monitoring.
    619   // Since these are "optional," only list ones that are non-zero, as the counts
    620   // are aggregated (summed) server side.
    621 
    622   SystemProfileProto::Stability* stability =
    623       uma_proto()->mutable_system_profile()->mutable_stability();
    624   int count = pref->GetInteger(prefs::kStabilityPageLoadCount);
    625   if (count) {
    626     stability->set_page_load_count(count);
    627     pref->SetInteger(prefs::kStabilityPageLoadCount, 0);
    628   }
    629 
    630   count = pref->GetInteger(prefs::kStabilityRendererCrashCount);
    631   if (count) {
    632     stability->set_renderer_crash_count(count);
    633     pref->SetInteger(prefs::kStabilityRendererCrashCount, 0);
    634   }
    635 
    636   count = pref->GetInteger(prefs::kStabilityExtensionRendererCrashCount);
    637   if (count) {
    638     stability->set_extension_renderer_crash_count(count);
    639     pref->SetInteger(prefs::kStabilityExtensionRendererCrashCount, 0);
    640   }
    641 
    642   count = pref->GetInteger(prefs::kStabilityRendererHangCount);
    643   if (count) {
    644     stability->set_renderer_hang_count(count);
    645     pref->SetInteger(prefs::kStabilityRendererHangCount, 0);
    646   }
    647 
    648   count = pref->GetInteger(prefs::kStabilityChildProcessCrashCount);
    649   if (count) {
    650     stability->set_child_process_crash_count(count);
    651     pref->SetInteger(prefs::kStabilityChildProcessCrashCount, 0);
    652   }
    653 
    654 #if defined(OS_CHROMEOS)
    655   count = pref->GetInteger(prefs::kStabilityOtherUserCrashCount);
    656   if (count) {
    657     stability->set_other_user_crash_count(count);
    658     pref->SetInteger(prefs::kStabilityOtherUserCrashCount, 0);
    659   }
    660 
    661   count = pref->GetInteger(prefs::kStabilityKernelCrashCount);
    662   if (count) {
    663     stability->set_kernel_crash_count(count);
    664     pref->SetInteger(prefs::kStabilityKernelCrashCount, 0);
    665   }
    666 
    667   count = pref->GetInteger(prefs::kStabilitySystemUncleanShutdownCount);
    668   if (count) {
    669     stability->set_unclean_system_shutdown_count(count);
    670     pref->SetInteger(prefs::kStabilitySystemUncleanShutdownCount, 0);
    671   }
    672 #endif  // OS_CHROMEOS
    673 
    674   const uint64 uptime_sec = incremental_uptime.InSeconds();
    675   if (uptime_sec)
    676     stability->set_uptime_sec(uptime_sec);
    677 }
    678 
    679 void MetricsLog::WritePluginList(
    680     const std::vector<content::WebPluginInfo>& plugin_list) {
    681   DCHECK(!locked());
    682 
    683 #if defined(ENABLE_PLUGINS)
    684   PluginPrefs* plugin_prefs = GetPluginPrefs();
    685   SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
    686   for (std::vector<content::WebPluginInfo>::const_iterator iter =
    687            plugin_list.begin();
    688        iter != plugin_list.end(); ++iter) {
    689     SystemProfileProto::Plugin* plugin = system_profile->add_plugin();
    690     SetPluginInfo(*iter, plugin_prefs, plugin);
    691   }
    692 #endif  // defined(ENABLE_PLUGINS)
    693 }
    694 
    695 void MetricsLog::RecordEnvironment(
    696     const std::vector<content::WebPluginInfo>& plugin_list,
    697     const GoogleUpdateMetrics& google_update_metrics,
    698     const std::vector<chrome_variations::ActiveGroupId>& synthetic_trials) {
    699   DCHECK(!HasEnvironment());
    700 
    701   SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
    702 
    703   std::string brand_code;
    704   if (google_util::GetBrand(&brand_code))
    705     system_profile->set_brand_code(brand_code);
    706 
    707   int enabled_date;
    708   bool success = base::StringToInt(GetMetricsEnabledDate(GetPrefService()),
    709                                    &enabled_date);
    710   DCHECK(success);
    711 
    712   // Reduce granularity of the enabled_date field to nearest hour.
    713   system_profile->set_uma_enabled_date(RoundSecondsToHour(enabled_date));
    714 
    715   int64 install_date = GetPrefService()->GetInt64(prefs::kInstallDate);
    716 
    717   // Reduce granularity of the install_date field to nearest hour.
    718   system_profile->set_install_date(RoundSecondsToHour(install_date));
    719 
    720   system_profile->set_application_locale(
    721       g_browser_process->GetApplicationLocale());
    722 
    723   SystemProfileProto::Hardware* hardware = system_profile->mutable_hardware();
    724   hardware->set_cpu_architecture(base::SysInfo::OperatingSystemArchitecture());
    725   hardware->set_system_ram_mb(base::SysInfo::AmountOfPhysicalMemoryMB());
    726 #if defined(OS_WIN)
    727   hardware->set_dll_base(reinterpret_cast<uint64>(&__ImageBase));
    728 #endif
    729 
    730   SystemProfileProto::Network* network = system_profile->mutable_network();
    731   network->set_connection_type_is_ambiguous(
    732       network_observer_.connection_type_is_ambiguous());
    733   network->set_connection_type(network_observer_.connection_type());
    734   network->set_wifi_phy_layer_protocol_is_ambiguous(
    735       network_observer_.wifi_phy_layer_protocol_is_ambiguous());
    736   network->set_wifi_phy_layer_protocol(
    737       network_observer_.wifi_phy_layer_protocol());
    738   network_observer_.Reset();
    739 
    740   SystemProfileProto::OS* os = system_profile->mutable_os();
    741   std::string os_name = base::SysInfo::OperatingSystemName();
    742 #if defined(OS_WIN)
    743   // TODO(mad): This only checks whether the main process is a Metro process at
    744   // upload time; not whether the collected metrics were all gathered from
    745   // Metro.  This is ok as an approximation for now, since users will rarely be
    746   // switching from Metro to Desktop mode; but we should re-evaluate whether we
    747   // can distinguish metrics more cleanly in the future: http://crbug.com/140568
    748   if (base::win::IsMetroProcess())
    749     os_name += " (Metro)";
    750 #endif
    751   os->set_name(os_name);
    752   os->set_version(base::SysInfo::OperatingSystemVersion());
    753 #if defined(OS_ANDROID)
    754   os->set_fingerprint(
    755       base::android::BuildInfo::GetInstance()->android_build_fp());
    756 #endif
    757 
    758   base::CPU cpu_info;
    759   SystemProfileProto::Hardware::CPU* cpu = hardware->mutable_cpu();
    760   cpu->set_vendor_name(cpu_info.vendor_name());
    761   cpu->set_signature(cpu_info.signature());
    762 
    763   const gpu::GPUInfo& gpu_info =
    764       GpuDataManager::GetInstance()->GetGPUInfo();
    765   SystemProfileProto::Hardware::Graphics* gpu = hardware->mutable_gpu();
    766   gpu->set_vendor_id(gpu_info.gpu.vendor_id);
    767   gpu->set_device_id(gpu_info.gpu.device_id);
    768   gpu->set_driver_version(gpu_info.driver_version);
    769   gpu->set_driver_date(gpu_info.driver_date);
    770   SystemProfileProto::Hardware::Graphics::PerformanceStatistics*
    771       gpu_performance = gpu->mutable_performance_statistics();
    772   gpu_performance->set_graphics_score(gpu_info.performance_stats.graphics);
    773   gpu_performance->set_gaming_score(gpu_info.performance_stats.gaming);
    774   gpu_performance->set_overall_score(gpu_info.performance_stats.overall);
    775   gpu->set_gl_vendor(gpu_info.gl_vendor);
    776   gpu->set_gl_renderer(gpu_info.gl_renderer);
    777 
    778   const gfx::Size display_size = GetScreenSize();
    779   hardware->set_primary_screen_width(display_size.width());
    780   hardware->set_primary_screen_height(display_size.height());
    781   hardware->set_primary_screen_scale_factor(GetScreenDeviceScaleFactor());
    782   hardware->set_screen_count(GetScreenCount());
    783 
    784 #if defined(OS_WIN)
    785   WriteScreenDPIInformationProto(hardware);
    786 #endif
    787 
    788   WriteGoogleUpdateProto(google_update_metrics);
    789 
    790   WritePluginList(plugin_list);
    791 
    792   std::vector<ActiveGroupId> field_trial_ids;
    793   GetFieldTrialIds(&field_trial_ids);
    794   WriteFieldTrials(field_trial_ids, system_profile);
    795   WriteFieldTrials(synthetic_trials, system_profile);
    796 
    797 #if defined(OS_CHROMEOS)
    798   PerfDataProto perf_data_proto;
    799   if (perf_provider_.GetPerfData(&perf_data_proto))
    800     uma_proto()->add_perf_data()->Swap(&perf_data_proto);
    801 
    802   // BluetoothAdapterFactory::GetAdapter is synchronous on Chrome OS; if that
    803   // changes this will fail at the DCHECK().
    804   device::BluetoothAdapterFactory::GetAdapter(
    805       base::Bind(&MetricsLog::SetBluetoothAdapter,
    806                  base::Unretained(this)));
    807   DCHECK(adapter_.get());
    808   WriteBluetoothProto(hardware);
    809   UpdateMultiProfileUserCount();
    810 #endif
    811 
    812   std::string serialied_system_profile;
    813   std::string base64_system_profile;
    814   if (system_profile->SerializeToString(&serialied_system_profile)) {
    815     base::Base64Encode(serialied_system_profile, &base64_system_profile);
    816     PrefService* local_state = GetPrefService();
    817     local_state->SetString(prefs::kStabilitySavedSystemProfile,
    818                            base64_system_profile);
    819     local_state->SetString(prefs::kStabilitySavedSystemProfileHash,
    820                            ComputeSHA1(serialied_system_profile));
    821   }
    822 }
    823 
    824 bool MetricsLog::LoadSavedEnvironmentFromPrefs() {
    825   PrefService* local_state = GetPrefService();
    826   const std::string base64_system_profile =
    827       local_state->GetString(prefs::kStabilitySavedSystemProfile);
    828   if (base64_system_profile.empty())
    829     return false;
    830 
    831   const std::string system_profile_hash =
    832       local_state->GetString(prefs::kStabilitySavedSystemProfileHash);
    833   local_state->ClearPref(prefs::kStabilitySavedSystemProfile);
    834   local_state->ClearPref(prefs::kStabilitySavedSystemProfileHash);
    835 
    836   SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
    837   std::string serialied_system_profile;
    838   return base::Base64Decode(base64_system_profile, &serialied_system_profile) &&
    839          ComputeSHA1(serialied_system_profile) == system_profile_hash &&
    840          system_profile->ParseFromString(serialied_system_profile);
    841 }
    842 
    843 void MetricsLog::RecordProfilerData(
    844     const tracked_objects::ProcessDataSnapshot& process_data,
    845     int process_type) {
    846   DCHECK(!locked());
    847 
    848   if (tracked_objects::GetTimeSourceType() !=
    849           tracked_objects::TIME_SOURCE_TYPE_WALL_TIME) {
    850     // We currently only support the default time source, wall clock time.
    851     return;
    852   }
    853 
    854   ProfilerEventProto* profile;
    855   if (!uma_proto()->profiler_event_size()) {
    856     // For the first process's data, add a new field to the protocol buffer.
    857     profile = uma_proto()->add_profiler_event();
    858     profile->set_profile_type(ProfilerEventProto::STARTUP_PROFILE);
    859     profile->set_time_source(ProfilerEventProto::WALL_CLOCK_TIME);
    860   } else {
    861     // For the remaining calls, re-use the existing field.
    862     profile = uma_proto()->mutable_profiler_event(0);
    863   }
    864 
    865   WriteProfilerData(process_data, process_type, profile);
    866 }
    867 
    868 void MetricsLog::RecordOmniboxOpenedURL(const OmniboxLog& log) {
    869   DCHECK(!locked());
    870 
    871   std::vector<base::string16> terms;
    872   const int num_terms =
    873       static_cast<int>(Tokenize(log.text, base::kWhitespaceUTF16, &terms));
    874 
    875   OmniboxEventProto* omnibox_event = uma_proto()->add_omnibox_event();
    876   omnibox_event->set_time(MetricsLogBase::GetCurrentTime());
    877   if (log.tab_id != -1) {
    878     // If we know what tab the autocomplete URL was opened in, log it.
    879     omnibox_event->set_tab_id(log.tab_id);
    880   }
    881   omnibox_event->set_typed_length(log.text.length());
    882   omnibox_event->set_just_deleted_text(log.just_deleted_text);
    883   omnibox_event->set_num_typed_terms(num_terms);
    884   omnibox_event->set_selected_index(log.selected_index);
    885   if (log.completed_length != base::string16::npos)
    886     omnibox_event->set_completed_length(log.completed_length);
    887   if (log.elapsed_time_since_user_first_modified_omnibox !=
    888       base::TimeDelta::FromMilliseconds(-1)) {
    889     // Only upload the typing duration if it is set/valid.
    890     omnibox_event->set_typing_duration_ms(
    891         log.elapsed_time_since_user_first_modified_omnibox.InMilliseconds());
    892   }
    893   omnibox_event->set_duration_since_last_default_match_update_ms(
    894       log.elapsed_time_since_last_change_to_default_match.InMilliseconds());
    895   omnibox_event->set_current_page_classification(
    896       AsOmniboxEventPageClassification(log.current_page_classification));
    897   omnibox_event->set_input_type(AsOmniboxEventInputType(log.input_type));
    898   omnibox_event->set_is_top_result_hidden_in_dropdown(
    899       log.result.ShouldHideTopMatch());
    900 
    901   for (AutocompleteResult::const_iterator i(log.result.begin());
    902        i != log.result.end(); ++i) {
    903     OmniboxEventProto::Suggestion* suggestion = omnibox_event->add_suggestion();
    904     suggestion->set_provider(i->provider->AsOmniboxEventProviderType());
    905     suggestion->set_result_type(AsOmniboxEventResultType(i->type));
    906     suggestion->set_relevance(i->relevance);
    907     if (i->typed_count != -1)
    908       suggestion->set_typed_count(i->typed_count);
    909     suggestion->set_is_starred(i->starred);
    910   }
    911   for (ProvidersInfo::const_iterator i(log.providers_info.begin());
    912        i != log.providers_info.end(); ++i) {
    913     OmniboxEventProto::ProviderInfo* provider_info =
    914         omnibox_event->add_provider_info();
    915     provider_info->CopyFrom(*i);
    916   }
    917 
    918   ++num_events_;
    919 }
    920 
    921 void MetricsLog::WriteGoogleUpdateProto(
    922     const GoogleUpdateMetrics& google_update_metrics) {
    923 #if defined(GOOGLE_CHROME_BUILD) && defined(OS_WIN)
    924   SystemProfileProto::GoogleUpdate* google_update =
    925       uma_proto()->mutable_system_profile()->mutable_google_update();
    926 
    927   google_update->set_is_system_install(google_update_metrics.is_system_install);
    928 
    929   if (!google_update_metrics.last_started_au.is_null()) {
    930     google_update->set_last_automatic_start_timestamp(
    931         google_update_metrics.last_started_au.ToTimeT());
    932   }
    933 
    934   if (!google_update_metrics.last_checked.is_null()) {
    935     google_update->set_last_update_check_timestamp(
    936       google_update_metrics.last_checked.ToTimeT());
    937   }
    938 
    939   if (!google_update_metrics.google_update_data.version.empty()) {
    940     ProductDataToProto(google_update_metrics.google_update_data,
    941                        google_update->mutable_google_update_status());
    942   }
    943 
    944   if (!google_update_metrics.product_data.version.empty()) {
    945     ProductDataToProto(google_update_metrics.product_data,
    946                        google_update->mutable_client_status());
    947   }
    948 #endif  // defined(GOOGLE_CHROME_BUILD) && defined(OS_WIN)
    949 }
    950 
    951 void MetricsLog::SetBluetoothAdapter(
    952     scoped_refptr<device::BluetoothAdapter> adapter) {
    953   adapter_ = adapter;
    954 }
    955 
    956 void MetricsLog::WriteBluetoothProto(
    957     SystemProfileProto::Hardware* hardware) {
    958 #if defined(OS_CHROMEOS)
    959   SystemProfileProto::Hardware::Bluetooth* bluetooth =
    960       hardware->mutable_bluetooth();
    961 
    962   bluetooth->set_is_present(adapter_->IsPresent());
    963   bluetooth->set_is_enabled(adapter_->IsPowered());
    964 
    965   device::BluetoothAdapter::DeviceList devices = adapter_->GetDevices();
    966   for (device::BluetoothAdapter::DeviceList::iterator iter =
    967            devices.begin(); iter != devices.end(); ++iter) {
    968     PairedDevice* paired_device = bluetooth->add_paired_device();
    969 
    970     device::BluetoothDevice* device = *iter;
    971     paired_device->set_bluetooth_class(device->GetBluetoothClass());
    972     paired_device->set_type(AsBluetoothDeviceType(device->GetDeviceType()));
    973 
    974     // address is xx:xx:xx:xx:xx:xx, extract the first three components and
    975     // pack into a uint32
    976     std::string address = device->GetAddress();
    977     if (address.size() > 9 &&
    978         address[2] == ':' && address[5] == ':' && address[8] == ':') {
    979       std::string vendor_prefix_str;
    980       uint64 vendor_prefix;
    981 
    982       base::RemoveChars(address.substr(0, 9), ":", &vendor_prefix_str);
    983       DCHECK_EQ(6U, vendor_prefix_str.size());
    984       base::HexStringToUInt64(vendor_prefix_str, &vendor_prefix);
    985 
    986       paired_device->set_vendor_prefix(vendor_prefix);
    987     }
    988 
    989     paired_device->set_vendor_id(device->GetVendorID());
    990     paired_device->set_product_id(device->GetProductID());
    991     paired_device->set_device_id(device->GetDeviceID());
    992   }
    993 #endif  // defined(OS_CHROMEOS)
    994 }
    995 
    996 #if defined(OS_CHROMEOS)
    997 void MetricsLog::UpdateMultiProfileUserCount() {
    998   if (chromeos::UserManager::IsInitialized() &&
    999       chromeos::UserManager::Get()->IsMultipleProfilesAllowed()) {
   1000     uint32 user_count = chromeos::UserManager::Get()
   1001         ->GetLoggedInUsers().size();
   1002     SystemProfileProto* system_profile = uma_proto()->mutable_system_profile();
   1003 
   1004     // We invalidate the user count if it changed while the log was open.
   1005     if (system_profile->has_multi_profile_user_count() &&
   1006         user_count != system_profile->multi_profile_user_count())
   1007       user_count = 0;
   1008 
   1009     system_profile->set_multi_profile_user_count(user_count);
   1010   }
   1011 }
   1012 #endif
   1013