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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/plugins/plugin_prefs.h"
      6 
      7 #include <string>
      8 
      9 #include "base/bind.h"
     10 #include "base/command_line.h"
     11 #include "base/memory/scoped_ptr.h"
     12 #include "base/message_loop/message_loop.h"
     13 #include "base/path_service.h"
     14 #include "base/strings/string_util.h"
     15 #include "base/strings/utf_string_conversions.h"
     16 #include "base/values.h"
     17 #include "build/build_config.h"
     18 #include "chrome/browser/browser_process.h"
     19 #include "chrome/browser/chrome_notification_types.h"
     20 #include "chrome/browser/plugins/plugin_installer.h"
     21 #include "chrome/browser/plugins/plugin_metadata.h"
     22 #include "chrome/browser/plugins/plugin_prefs_factory.h"
     23 #include "chrome/browser/prefs/scoped_user_pref_update.h"
     24 #include "chrome/browser/profiles/profile.h"
     25 #include "chrome/common/chrome_constants.h"
     26 #include "chrome/common/chrome_content_client.h"
     27 #include "chrome/common/chrome_paths.h"
     28 #include "chrome/common/chrome_switches.h"
     29 #include "chrome/common/pref_names.h"
     30 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
     31 #include "content/public/browser/browser_thread.h"
     32 #include "content/public/browser/notification_service.h"
     33 #include "content/public/browser/plugin_service.h"
     34 #include "content/public/common/webplugininfo.h"
     35 
     36 using content::BrowserThread;
     37 using content::PluginService;
     38 
     39 namespace {
     40 
     41 bool IsComponentUpdatedPepperFlash(const base::FilePath& plugin) {
     42   if (plugin.BaseName().value() == chrome::kPepperFlashPluginFilename) {
     43     base::FilePath component_updated_pepper_flash_dir;
     44     if (PathService::Get(chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN,
     45                          &component_updated_pepper_flash_dir) &&
     46         component_updated_pepper_flash_dir.IsParent(plugin)) {
     47       return true;
     48     }
     49   }
     50 
     51   return false;
     52 }
     53 
     54 }  // namespace
     55 
     56 PluginPrefs::PluginState::PluginState() {
     57 }
     58 
     59 PluginPrefs::PluginState::~PluginState() {
     60 }
     61 
     62 bool PluginPrefs::PluginState::Get(const base::FilePath& plugin,
     63                                    bool* enabled) const {
     64   base::FilePath key = ConvertMapKey(plugin);
     65   std::map<base::FilePath, bool>::const_iterator iter = state_.find(key);
     66   if (iter != state_.end()) {
     67     *enabled = iter->second;
     68     return true;
     69   }
     70   return false;
     71 }
     72 
     73 void PluginPrefs::PluginState::Set(const base::FilePath& plugin, bool enabled) {
     74   state_[ConvertMapKey(plugin)] = enabled;
     75 }
     76 
     77 base::FilePath PluginPrefs::PluginState::ConvertMapKey(
     78     const base::FilePath& plugin) const {
     79   // Keep the state of component-updated and bundled Pepper Flash in sync.
     80   if (IsComponentUpdatedPepperFlash(plugin)) {
     81     base::FilePath bundled_pepper_flash;
     82     if (PathService::Get(chrome::FILE_PEPPER_FLASH_PLUGIN,
     83                          &bundled_pepper_flash)) {
     84       return bundled_pepper_flash;
     85     }
     86   }
     87 
     88   return plugin;
     89 }
     90 
     91 // static
     92 scoped_refptr<PluginPrefs> PluginPrefs::GetForProfile(Profile* profile) {
     93   return PluginPrefsFactory::GetPrefsForProfile(profile);
     94 }
     95 
     96 // static
     97 scoped_refptr<PluginPrefs> PluginPrefs::GetForTestingProfile(
     98     Profile* profile) {
     99   return static_cast<PluginPrefs*>(
    100       PluginPrefsFactory::GetInstance()->SetTestingFactoryAndUse(
    101           profile, &PluginPrefsFactory::CreateForTestingProfile).get());
    102 }
    103 
    104 void PluginPrefs::EnablePluginGroup(bool enabled, const string16& group_name) {
    105   PluginService::GetInstance()->GetPlugins(
    106       base::Bind(&PluginPrefs::EnablePluginGroupInternal,
    107                  this, enabled, group_name));
    108 }
    109 
    110 void PluginPrefs::EnablePluginGroupInternal(
    111     bool enabled,
    112     const string16& group_name,
    113     const std::vector<content::WebPluginInfo>& plugins) {
    114   base::AutoLock auto_lock(lock_);
    115   PluginFinder* finder = PluginFinder::GetInstance();
    116 
    117   // Set the desired state for the group.
    118   plugin_group_state_[group_name] = enabled;
    119 
    120   // Update the state for all plug-ins in the group.
    121   for (size_t i = 0; i < plugins.size(); ++i) {
    122     scoped_ptr<PluginMetadata> plugin(finder->GetPluginMetadata(plugins[i]));
    123     if (group_name != plugin->name())
    124       continue;
    125     plugin_state_.Set(plugins[i].path, enabled);
    126   }
    127 
    128   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
    129       base::Bind(&PluginPrefs::OnUpdatePreferences, this, plugins));
    130   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
    131       base::Bind(&PluginPrefs::NotifyPluginStatusChanged, this));
    132 }
    133 
    134 void PluginPrefs::EnablePlugin(
    135     bool enabled, const base::FilePath& path,
    136     const base::Callback<void(bool)>& callback) {
    137   PluginFinder* finder = PluginFinder::GetInstance();
    138   content::WebPluginInfo plugin;
    139   bool can_enable = true;
    140   if (PluginService::GetInstance()->GetPluginInfoByPath(path, &plugin)) {
    141     scoped_ptr<PluginMetadata> plugin_metadata(
    142         finder->GetPluginMetadata(plugin));
    143     PolicyStatus plugin_status = PolicyStatusForPlugin(plugin.name);
    144     PolicyStatus group_status = PolicyStatusForPlugin(plugin_metadata->name());
    145     if (enabled) {
    146       if (plugin_status == POLICY_DISABLED || group_status == POLICY_DISABLED)
    147         can_enable = false;
    148     } else {
    149       if (plugin_status == POLICY_ENABLED || group_status == POLICY_ENABLED)
    150         can_enable = false;
    151     }
    152   } else {
    153     NOTREACHED();
    154   }
    155 
    156   if (!can_enable) {
    157     base::MessageLoop::current()->PostTask(FROM_HERE,
    158                                            base::Bind(callback, false));
    159     return;
    160   }
    161 
    162   PluginService::GetInstance()->GetPlugins(
    163       base::Bind(&PluginPrefs::EnablePluginInternal, this,
    164                  enabled, path, finder, callback));
    165 }
    166 
    167 void PluginPrefs::EnablePluginInternal(
    168     bool enabled,
    169     const base::FilePath& path,
    170     PluginFinder* plugin_finder,
    171     const base::Callback<void(bool)>& callback,
    172     const std::vector<content::WebPluginInfo>& plugins) {
    173   {
    174     // Set the desired state for the plug-in.
    175     base::AutoLock auto_lock(lock_);
    176     plugin_state_.Set(path, enabled);
    177   }
    178 
    179   string16 group_name;
    180   for (size_t i = 0; i < plugins.size(); ++i) {
    181     if (plugins[i].path == path) {
    182       scoped_ptr<PluginMetadata> plugin_metadata(
    183           plugin_finder->GetPluginMetadata(plugins[i]));
    184       // set the group name for this plug-in.
    185       group_name = plugin_metadata->name();
    186       DCHECK_EQ(enabled, IsPluginEnabled(plugins[i]));
    187       break;
    188     }
    189   }
    190 
    191   bool all_disabled = true;
    192   for (size_t i = 0; i < plugins.size(); ++i) {
    193     scoped_ptr<PluginMetadata> plugin_metadata(
    194         plugin_finder->GetPluginMetadata(plugins[i]));
    195     DCHECK(!plugin_metadata->name().empty());
    196     if (group_name == plugin_metadata->name()) {
    197       all_disabled = all_disabled && !IsPluginEnabled(plugins[i]);
    198     }
    199   }
    200 
    201   if (!group_name.empty()) {
    202     // Update the state for the corresponding plug-in group.
    203     base::AutoLock auto_lock(lock_);
    204     plugin_group_state_[group_name] = !all_disabled;
    205   }
    206 
    207   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
    208       base::Bind(&PluginPrefs::OnUpdatePreferences, this, plugins));
    209   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
    210       base::Bind(&PluginPrefs::NotifyPluginStatusChanged, this));
    211   callback.Run(true);
    212 }
    213 
    214 PluginPrefs::PolicyStatus PluginPrefs::PolicyStatusForPlugin(
    215     const string16& name) const {
    216   base::AutoLock auto_lock(lock_);
    217   if (IsStringMatchedInSet(name, policy_enabled_plugin_patterns_)) {
    218     return POLICY_ENABLED;
    219   } else if (IsStringMatchedInSet(name, policy_disabled_plugin_patterns_) &&
    220              !IsStringMatchedInSet(
    221                  name, policy_disabled_plugin_exception_patterns_)) {
    222     return POLICY_DISABLED;
    223   } else {
    224     return NO_POLICY;
    225   }
    226 }
    227 
    228 bool PluginPrefs::IsPluginEnabled(const content::WebPluginInfo& plugin) const {
    229   scoped_ptr<PluginMetadata> plugin_metadata(
    230       PluginFinder::GetInstance()->GetPluginMetadata(plugin));
    231   string16 group_name = plugin_metadata->name();
    232 
    233   // Check if the plug-in or its group is enabled by policy.
    234   PolicyStatus plugin_status = PolicyStatusForPlugin(plugin.name);
    235   PolicyStatus group_status = PolicyStatusForPlugin(group_name);
    236   if (plugin_status == POLICY_ENABLED || group_status == POLICY_ENABLED)
    237     return true;
    238 
    239   // Check if the plug-in or its group is disabled by policy.
    240   if (plugin_status == POLICY_DISABLED || group_status == POLICY_DISABLED)
    241     return false;
    242 
    243   // If enabling NaCl, make sure the plugin is also enabled. See bug
    244   // http://code.google.com/p/chromium/issues/detail?id=81010 for more
    245   // information.
    246   // TODO(dspringer): When NaCl is on by default, remove this code.
    247   if ((plugin.name ==
    248        ASCIIToUTF16(chrome::ChromeContentClient::kNaClPluginName)) &&
    249       CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableNaCl)) {
    250     return true;
    251   }
    252 
    253   base::AutoLock auto_lock(lock_);
    254   // Check user preferences for the plug-in.
    255   bool plugin_enabled = false;
    256   if (plugin_state_.Get(plugin.path, &plugin_enabled))
    257     return plugin_enabled;
    258 
    259   // Check user preferences for the plug-in group.
    260   std::map<string16, bool>::const_iterator group_it(
    261       plugin_group_state_.find(group_name));
    262   if (group_it != plugin_group_state_.end())
    263     return group_it->second;
    264 
    265   // Default to enabled.
    266   return true;
    267 }
    268 
    269 void PluginPrefs::UpdatePatternsAndNotify(std::set<string16>* patterns,
    270                                           const std::string& pref_name) {
    271   base::AutoLock auto_lock(lock_);
    272   ListValueToStringSet(prefs_->GetList(pref_name.c_str()), patterns);
    273 
    274   NotifyPluginStatusChanged();
    275 }
    276 
    277 /*static*/
    278 bool PluginPrefs::IsStringMatchedInSet(const string16& name,
    279                                        const std::set<string16>& pattern_set) {
    280   std::set<string16>::const_iterator pattern(pattern_set.begin());
    281   while (pattern != pattern_set.end()) {
    282     if (MatchPattern(name, *pattern))
    283       return true;
    284     ++pattern;
    285   }
    286 
    287   return false;
    288 }
    289 
    290 /* static */
    291 void PluginPrefs::ListValueToStringSet(const ListValue* src,
    292                                        std::set<string16>* dest) {
    293   DCHECK(src);
    294   DCHECK(dest);
    295   dest->clear();
    296   ListValue::const_iterator end(src->end());
    297   for (ListValue::const_iterator current(src->begin());
    298        current != end; ++current) {
    299     string16 plugin_name;
    300     if ((*current)->GetAsString(&plugin_name)) {
    301       dest->insert(plugin_name);
    302     }
    303   }
    304 }
    305 
    306 void PluginPrefs::SetPrefs(PrefService* prefs) {
    307   prefs_ = prefs;
    308   bool update_internal_dir = false;
    309   base::FilePath last_internal_dir =
    310       prefs_->GetFilePath(prefs::kPluginsLastInternalDirectory);
    311   base::FilePath cur_internal_dir;
    312   if (PathService::Get(chrome::DIR_INTERNAL_PLUGINS, &cur_internal_dir) &&
    313       cur_internal_dir != last_internal_dir) {
    314     update_internal_dir = true;
    315     prefs_->SetFilePath(
    316         prefs::kPluginsLastInternalDirectory, cur_internal_dir);
    317   }
    318 
    319   bool migrate_to_pepper_flash = false;
    320 #if defined(OS_WIN) || defined(OS_MACOSX)
    321   // If bundled NPAPI Flash is enabled while Pepper Flash is disabled, we
    322   // would like to turn Pepper Flash on. And we only want to do it once.
    323   // TODO(yzshen): Remove all |migrate_to_pepper_flash|-related code after it
    324   // has been run once by most users. (Maybe Chrome 24 or Chrome 25.)
    325   // NOTE(shess): Keep in mind that Mac is on a different schedule.
    326   if (!prefs_->GetBoolean(prefs::kPluginsMigratedToPepperFlash)) {
    327     prefs_->SetBoolean(prefs::kPluginsMigratedToPepperFlash, true);
    328     migrate_to_pepper_flash = true;
    329   }
    330 #endif
    331 
    332   bool remove_component_pepper_flash_settings = false;
    333   // If component-updated Pepper Flash is disabled, we would like to remove that
    334   // settings item. And we only want to do it once. (Please see the comments of
    335   // kPluginsRemovedOldComponentPepperFlashSettings for why.)
    336   // TODO(yzshen): Remove all |remove_component_pepper_flash_settings|-related
    337   // code after it has been run once by most users.
    338   if (!prefs_->GetBoolean(
    339           prefs::kPluginsRemovedOldComponentPepperFlashSettings)) {
    340     prefs_->SetBoolean(prefs::kPluginsRemovedOldComponentPepperFlashSettings,
    341                        true);
    342     remove_component_pepper_flash_settings = true;
    343   }
    344 
    345   {  // Scoped update of prefs::kPluginsPluginsList.
    346     ListPrefUpdate update(prefs_, prefs::kPluginsPluginsList);
    347     ListValue* saved_plugins_list = update.Get();
    348     if (saved_plugins_list && !saved_plugins_list->empty()) {
    349       // The following four variables are only valid when
    350       // |migrate_to_pepper_flash| is set to true.
    351       base::FilePath npapi_flash;
    352       base::FilePath pepper_flash;
    353       DictionaryValue* pepper_flash_node = NULL;
    354       bool npapi_flash_enabled = false;
    355       if (migrate_to_pepper_flash) {
    356         PathService::Get(chrome::FILE_FLASH_PLUGIN, &npapi_flash);
    357         PathService::Get(chrome::FILE_PEPPER_FLASH_PLUGIN, &pepper_flash);
    358       }
    359 
    360       // Used when |remove_component_pepper_flash_settings| is set to true.
    361       ListValue::iterator component_pepper_flash_node =
    362           saved_plugins_list->end();
    363 
    364       for (ListValue::iterator it = saved_plugins_list->begin();
    365            it != saved_plugins_list->end();
    366            ++it) {
    367         if (!(*it)->IsType(Value::TYPE_DICTIONARY)) {
    368           LOG(WARNING) << "Invalid entry in " << prefs::kPluginsPluginsList;
    369           continue;  // Oops, don't know what to do with this item.
    370         }
    371 
    372         DictionaryValue* plugin = static_cast<DictionaryValue*>(*it);
    373         string16 group_name;
    374         bool enabled;
    375         if (!plugin->GetBoolean("enabled", &enabled))
    376           enabled = true;
    377 
    378         base::FilePath::StringType path;
    379         // The plugin list constains all the plugin files in addition to the
    380         // plugin groups.
    381         if (plugin->GetString("path", &path)) {
    382           // Files have a path attribute, groups don't.
    383           base::FilePath plugin_path(path);
    384 
    385           // The path to the intenral plugin directory changes everytime Chrome
    386           // is auto-updated, since it contains the current version number. For
    387           // example, it changes from foobar\Chrome\Application\21.0.1180.83 to
    388           // foobar\Chrome\Application\21.0.1180.89.
    389           // However, we would like the settings of internal plugins to persist
    390           // across Chrome updates. Therefore, we need to recognize those paths
    391           // that are within the previous internal plugin directory, and update
    392           // them in the prefs accordingly.
    393           if (update_internal_dir) {
    394             base::FilePath relative_path;
    395 
    396             // Extract the part of |plugin_path| that is relative to
    397             // |last_internal_dir|. For example, |relative_path| will be
    398             // foo\bar.dll if |plugin_path| is <last_internal_dir>\foo\bar.dll.
    399             //
    400             // Every iteration the last path component from |plugin_path| is
    401             // removed and prepended to |relative_path| until we get up to
    402             // |last_internal_dir|.
    403             while (last_internal_dir.IsParent(plugin_path)) {
    404               relative_path = plugin_path.BaseName().Append(relative_path);
    405 
    406               base::FilePath old_path = plugin_path;
    407               plugin_path = plugin_path.DirName();
    408               // To be extra sure that we won't end up in an infinite loop.
    409               if (old_path == plugin_path) {
    410                 NOTREACHED();
    411                 break;
    412               }
    413             }
    414 
    415             // If |relative_path| is empty, |plugin_path| is not within
    416             // |last_internal_dir|. We don't need to update it.
    417             if (!relative_path.empty()) {
    418               plugin_path = cur_internal_dir.Append(relative_path);
    419               path = plugin_path.value();
    420               plugin->SetString("path", path);
    421             }
    422           }
    423 
    424           if (migrate_to_pepper_flash &&
    425                      base::FilePath::CompareEqualIgnoreCase(
    426                          path, npapi_flash.value())) {
    427             npapi_flash_enabled = enabled;
    428           } else if (migrate_to_pepper_flash &&
    429                      base::FilePath::CompareEqualIgnoreCase(
    430                          path, pepper_flash.value())) {
    431             if (!enabled)
    432               pepper_flash_node = plugin;
    433           } else if (remove_component_pepper_flash_settings &&
    434                      IsComponentUpdatedPepperFlash(plugin_path)) {
    435             if (!enabled) {
    436               component_pepper_flash_node = it;
    437               // Skip setting |enabled| into |plugin_state_|.
    438               continue;
    439             }
    440           }
    441 
    442           plugin_state_.Set(plugin_path, enabled);
    443         } else if (!enabled && plugin->GetString("name", &group_name)) {
    444           // Otherwise this is a list of groups.
    445           plugin_group_state_[group_name] = false;
    446         }
    447       }
    448 
    449       if (npapi_flash_enabled && pepper_flash_node) {
    450         DCHECK(migrate_to_pepper_flash);
    451         pepper_flash_node->SetBoolean("enabled", true);
    452         plugin_state_.Set(pepper_flash, true);
    453       }
    454 
    455       if (component_pepper_flash_node != saved_plugins_list->end()) {
    456         DCHECK(remove_component_pepper_flash_settings);
    457         saved_plugins_list->Erase(component_pepper_flash_node, NULL);
    458       }
    459     } else {
    460       // If the saved plugin list is empty, then the call to UpdatePreferences()
    461       // below failed in an earlier run, possibly because the user closed the
    462       // browser too quickly.
    463 
    464       // Only want one PDF plugin enabled at a time. See http://crbug.com/50105
    465       // for background.
    466       plugin_group_state_[ASCIIToUTF16(
    467           PluginMetadata::kAdobeReaderGroupName)] = false;
    468     }
    469   }  // Scoped update of prefs::kPluginsPluginsList.
    470 
    471   // Build the set of policy enabled/disabled plugin patterns once and cache it.
    472   // Don't do this in the constructor, there's no profile available there.
    473   ListValueToStringSet(prefs_->GetList(prefs::kPluginsDisabledPlugins),
    474                        &policy_disabled_plugin_patterns_);
    475   ListValueToStringSet(
    476       prefs_->GetList(prefs::kPluginsDisabledPluginsExceptions),
    477       &policy_disabled_plugin_exception_patterns_);
    478   ListValueToStringSet(prefs_->GetList(prefs::kPluginsEnabledPlugins),
    479                        &policy_enabled_plugin_patterns_);
    480 
    481   registrar_.Init(prefs_);
    482 
    483   // Because pointers to our own members will remain unchanged for the
    484   // lifetime of |registrar_| (which we also own), we can bind their
    485   // pointer values directly in the callbacks to avoid string-based
    486   // lookups at notification time.
    487   registrar_.Add(prefs::kPluginsDisabledPlugins,
    488                  base::Bind(&PluginPrefs::UpdatePatternsAndNotify,
    489                             base::Unretained(this),
    490                             &policy_disabled_plugin_patterns_));
    491   registrar_.Add(prefs::kPluginsDisabledPluginsExceptions,
    492                  base::Bind(&PluginPrefs::UpdatePatternsAndNotify,
    493                             base::Unretained(this),
    494                             &policy_disabled_plugin_exception_patterns_));
    495   registrar_.Add(prefs::kPluginsEnabledPlugins,
    496                  base::Bind(&PluginPrefs::UpdatePatternsAndNotify,
    497                             base::Unretained(this),
    498                             &policy_enabled_plugin_patterns_));
    499 
    500   NotifyPluginStatusChanged();
    501 }
    502 
    503 void PluginPrefs::ShutdownOnUIThread() {
    504   prefs_ = NULL;
    505   registrar_.RemoveAll();
    506 }
    507 
    508 PluginPrefs::PluginPrefs() : profile_(NULL),
    509                              prefs_(NULL) {
    510 }
    511 
    512 PluginPrefs::~PluginPrefs() {
    513 }
    514 
    515 void PluginPrefs::SetPolicyEnforcedPluginPatterns(
    516     const std::set<string16>& disabled_patterns,
    517     const std::set<string16>& disabled_exception_patterns,
    518     const std::set<string16>& enabled_patterns) {
    519   policy_disabled_plugin_patterns_ = disabled_patterns;
    520   policy_disabled_plugin_exception_patterns_ = disabled_exception_patterns;
    521   policy_enabled_plugin_patterns_ = enabled_patterns;
    522 }
    523 
    524 void PluginPrefs::OnUpdatePreferences(
    525     const std::vector<content::WebPluginInfo>& plugins) {
    526   if (!prefs_)
    527     return;
    528 
    529   PluginFinder* finder = PluginFinder::GetInstance();
    530   ListPrefUpdate update(prefs_, prefs::kPluginsPluginsList);
    531   ListValue* plugins_list = update.Get();
    532   plugins_list->Clear();
    533 
    534   base::FilePath internal_dir;
    535   if (PathService::Get(chrome::DIR_INTERNAL_PLUGINS, &internal_dir))
    536     prefs_->SetFilePath(prefs::kPluginsLastInternalDirectory, internal_dir);
    537 
    538   base::AutoLock auto_lock(lock_);
    539 
    540   // Add the plugin files.
    541   std::set<string16> group_names;
    542   for (size_t i = 0; i < plugins.size(); ++i) {
    543     DictionaryValue* summary = new DictionaryValue();
    544     summary->SetString("path", plugins[i].path.value());
    545     summary->SetString("name", plugins[i].name);
    546     summary->SetString("version", plugins[i].version);
    547     bool enabled = true;
    548     plugin_state_.Get(plugins[i].path, &enabled);
    549     summary->SetBoolean("enabled", enabled);
    550     plugins_list->Append(summary);
    551 
    552     scoped_ptr<PluginMetadata> plugin_metadata(
    553         finder->GetPluginMetadata(plugins[i]));
    554     // Insert into a set of all group names.
    555     group_names.insert(plugin_metadata->name());
    556   }
    557 
    558   // Add the plug-in groups.
    559   for (std::set<string16>::const_iterator it = group_names.begin();
    560       it != group_names.end(); ++it) {
    561     DictionaryValue* summary = new DictionaryValue();
    562     summary->SetString("name", *it);
    563     bool enabled = true;
    564     std::map<string16, bool>::iterator gstate_it =
    565         plugin_group_state_.find(*it);
    566     if (gstate_it != plugin_group_state_.end())
    567       enabled = gstate_it->second;
    568     summary->SetBoolean("enabled", enabled);
    569     plugins_list->Append(summary);
    570   }
    571 }
    572 
    573 void PluginPrefs::NotifyPluginStatusChanged() {
    574   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
    575   content::NotificationService::current()->Notify(
    576       chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED,
    577       content::Source<Profile>(profile_),
    578       content::NotificationService::NoDetails());
    579 }
    580