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      1 // Copyright 2013 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/ui/app_list/app_list_service.h"
      6 
      7 #include "base/command_line.h"
      8 #include "base/metrics/histogram.h"
      9 #include "base/prefs/pref_registry_simple.h"
     10 #include "base/process/process_info.h"
     11 #include "base/strings/string_number_conversions.h"
     12 #include "base/time/time.h"
     13 #include "chrome/common/chrome_switches.h"
     14 #include "chrome/common/pref_names.h"
     15 
     16 namespace {
     17 
     18 base::TimeDelta GetTimeFromOriginalProcessStart(
     19     const CommandLine& command_line) {
     20   std::string start_time_string =
     21       command_line.GetSwitchValueASCII(switches::kOriginalProcessStartTime);
     22   int64 remote_start_time;
     23   base::StringToInt64(start_time_string, &remote_start_time);
     24   return base::Time::Now() - base::Time::FromInternalValue(remote_start_time);
     25 }
     26 
     27 }  // namespace
     28 
     29 // static
     30 void AppListService::RegisterPrefs(PrefRegistrySimple* registry) {
     31   registry->RegisterInt64Pref(prefs::kLastAppListLaunchPing, 0);
     32   registry->RegisterIntegerPref(prefs::kAppListLaunchCount, 0);
     33   registry->RegisterInt64Pref(prefs::kLastAppListAppLaunchPing, 0);
     34   registry->RegisterIntegerPref(prefs::kAppListAppLaunchCount, 0);
     35   registry->RegisterStringPref(prefs::kAppListProfile, std::string());
     36   registry->RegisterBooleanPref(prefs::kRestartWithAppList, false);
     37 }
     38 
     39 // static
     40 void AppListService::RecordShowTimings(const CommandLine& command_line) {
     41   // The presence of kOriginalProcessStartTime implies that another process
     42   // has sent us its command line to handle, ie: we are already running.
     43   if (command_line.HasSwitch(switches::kOriginalProcessStartTime)) {
     44     base::TimeDelta elapsed = GetTimeFromOriginalProcessStart(command_line);
     45     if (command_line.HasSwitch(switches::kFastStart))
     46       UMA_HISTOGRAM_LONG_TIMES("Startup.ShowAppListWarmStartFast", elapsed);
     47     else
     48       UMA_HISTOGRAM_LONG_TIMES("Startup.ShowAppListWarmStart", elapsed);
     49   } else {
     50     // base::CurrentProcessInfo::CreationTime() is only defined on some
     51     // platforms.
     52 #if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
     53     UMA_HISTOGRAM_LONG_TIMES(
     54         "Startup.ShowAppListColdStart",
     55         base::Time::Now() - base::CurrentProcessInfo::CreationTime());
     56 #endif
     57   }
     58 }
     59