chrome/browser/plugins/plugin_prefs.cc

   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/location.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/path_service.h"
  14 #include "base/prefs/scoped_user_pref_update.h"
  15 #include "base/single_thread_task_runner.h"
  16 #include "base/strings/pattern.h"
  17 #include "base/strings/string_util.h"
  18 #include "base/strings/utf_string_conversions.h"
  19 #include "base/thread_task_runner_handle.h"
  20 #include "base/values.h"
  21 #include "build/build_config.h"
  22 #include "chrome/browser/browser_process.h"
  23 #include "chrome/browser/chrome_notification_types.h"
  24 #include "chrome/browser/plugins/plugin_installer.h"
  25 #include "chrome/browser/plugins/plugin_metadata.h"
  26 #include "chrome/browser/plugins/plugin_prefs_factory.h"
  27 #include "chrome/browser/profiles/profile.h"
  28 #include "chrome/common/chrome_constants.h"
  29 #include "chrome/common/chrome_paths.h"
  30 #include "chrome/common/chrome_switches.h"
  31 #include "chrome/common/pref_names.h"
  32 #include "components/keyed_service/core/keyed_service.h"
  33 #include "content/public/browser/browser_thread.h"
  34 #include "content/public/browser/notification_service.h"
  35 #include "content/public/browser/plugin_service.h"
  36 #include "content/public/common/webplugininfo.h"
  37
  38 #if !defined(DISABLE_NACL)
  39 #include "components/nacl/common/nacl_constants.h"
  40 #endif
  41
  42 using content::BrowserThread;
  43 using content::PluginService;
  44
  45 namespace {
  46
  47 bool IsComponentUpdatedPepperFlash(const base::FilePath& plugin) {
  48   if (plugin.BaseName().value() == chrome::kPepperFlashPluginFilename) {
  49     base::FilePath component_updated_pepper_flash_dir;
  50     if (PathService::Get(chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN,
  51                          &component_updated_pepper_flash_dir) &&
  52         component_updated_pepper_flash_dir.IsParent(plugin)) {
  53       return true;
  54     }
  55   }
  56
  57   return false;
  58 }
  59
  60 // Returns true if |path| looks like the path to an NPAPI Flash plugin.
  61 bool IsNpapiFlashPath(const base::FilePath& path) {
  62   base::FilePath npapi_flash;
  63   // Check NPAPI Flash is installed.
  64   if (!PathService::Get(chrome::FILE_FLASH_SYSTEM_PLUGIN, &npapi_flash))
  65     return false;
  66   // Check for same architecture NPAPI Flash.
  67   if (base::FilePath::CompareEqualIgnoreCase(path.value(), npapi_flash.value()))
  68     return true;
  69 #if defined(OS_WIN)
  70   // Fuzzy check for NPAPI Flash on Windows.
  71   base::FilePath::StringType kSwfPrefix = FILE_PATH_LITERAL("NPSWF");
  72   if (path.BaseName().value().compare(0, kSwfPrefix.size(), kSwfPrefix) == 0)
  73     return true;
  74 #endif
  75   return false;
  76 }
  77
  78 }  // namespace
  79
  80 PluginPrefs::PluginState::PluginState() {
  81 }
  82
  83 PluginPrefs::PluginState::~PluginState() {
  84 }
  85
  86 bool PluginPrefs::PluginState::Get(const base::FilePath& plugin,
  87                                    bool* enabled) const {
  88   base::FilePath key = ConvertMapKey(plugin);
  89   std::map<base::FilePath, bool>::const_iterator iter = state_.find(key);
  90   if (iter != state_.end()) {
  91     *enabled = iter->second;
  92     return true;
  93   }
  94   return false;
  95 }
  96
  97 void PluginPrefs::PluginState::Set(const base::FilePath& plugin, bool enabled) {
  98   state_[ConvertMapKey(plugin)] = enabled;
  99 }
 100
 101 base::FilePath PluginPrefs::PluginState::ConvertMapKey(
 102     const base::FilePath& plugin) const {
 103   // Keep the state of component-updated and bundled Pepper Flash in sync.
 104   if (IsComponentUpdatedPepperFlash(plugin)) {
 105     base::FilePath bundled_pepper_flash;
 106     if (PathService::Get(chrome::FILE_PEPPER_FLASH_PLUGIN,
 107                          &bundled_pepper_flash)) {
 108       return bundled_pepper_flash;
 109     }
 110   }
 111
 112   return plugin;
 113 }
 114
 115 // static
 116 scoped_refptr<PluginPrefs> PluginPrefs::GetForProfile(Profile* profile) {
 117   return PluginPrefsFactory::GetPrefsForProfile(profile);
 118 }
 119
 120 // static
 121 scoped_refptr<PluginPrefs> PluginPrefs::GetForTestingProfile(
 122     Profile* profile) {
 123   return static_cast<PluginPrefs*>(
 124       PluginPrefsFactory::GetInstance()->SetTestingFactoryAndUse(
 125           profile, &PluginPrefsFactory::CreateForTestingProfile).get());
 126 }
 127
 128 void PluginPrefs::EnablePluginGroup(bool enabled,
 129                                     const base::string16& group_name) {
 130   PluginService::GetInstance()->GetPlugins(
 131       base::Bind(&PluginPrefs::EnablePluginGroupInternal,
 132                  this, enabled, group_name));
 133 }
 134
 135 void PluginPrefs::EnablePluginGroupInternal(
 136     bool enabled,
 137     const base::string16& group_name,
 138     const std::vector<content::WebPluginInfo>& plugins) {
 139   base::AutoLock auto_lock(lock_);
 140   PluginFinder* finder = PluginFinder::GetInstance();
 141
 142   // Set the desired state for the group.
 143   plugin_group_state_[group_name] = enabled;
 144
 145   // Update the state for all plugins in the group.
 146   for (size_t i = 0; i < plugins.size(); ++i) {
 147     scoped_ptr<PluginMetadata> plugin(finder->GetPluginMetadata(plugins[i]));
 148     if (group_name != plugin->name())
 149       continue;
 150     plugin_state_.Set(plugins[i].path, enabled);
 151   }
 152
 153   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
 154       base::Bind(&PluginPrefs::OnUpdatePreferences, this, plugins));
 155   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
 156       base::Bind(&PluginPrefs::NotifyPluginStatusChanged, this));
 157 }
 158
 159 void PluginPrefs::EnablePlugin(
 160     bool enabled, const base::FilePath& path,
 161     const base::Callback<void(bool)>& callback) {
 162   PluginFinder* finder = PluginFinder::GetInstance();
 163   content::WebPluginInfo plugin;
 164   bool can_enable = true;
 165   if (PluginService::GetInstance()->GetPluginInfoByPath(path, &plugin)) {
 166     scoped_ptr<PluginMetadata> plugin_metadata(
 167         finder->GetPluginMetadata(plugin));
 168     PolicyStatus plugin_status = PolicyStatusForPlugin(plugin.name);
 169     PolicyStatus group_status = PolicyStatusForPlugin(plugin_metadata->name());
 170     if (enabled) {
 171       if (plugin_status == POLICY_DISABLED || group_status == POLICY_DISABLED)
 172         can_enable = false;
 173     } else {
 174       if (plugin_status == POLICY_ENABLED || group_status == POLICY_ENABLED)
 175         can_enable = false;
 176     }
 177   } else {
 178     NOTREACHED();
 179   }
 180
 181   if (!can_enable) {
 182     base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
 183                                                   base::Bind(callback, false));
 184     return;
 185   }
 186
 187   PluginService::GetInstance()->GetPlugins(
 188       base::Bind(&PluginPrefs::EnablePluginInternal, this,
 189                  enabled, path, finder, callback));
 190 }
 191
 192 void PluginPrefs::EnablePluginInternal(
 193     bool enabled,
 194     const base::FilePath& path,
 195     PluginFinder* plugin_finder,
 196     const base::Callback<void(bool)>& callback,
 197     const std::vector<content::WebPluginInfo>& plugins) {
 198   {
 199     // Set the desired state for the plugin.
 200     base::AutoLock auto_lock(lock_);
 201     plugin_state_.Set(path, enabled);
 202   }
 203
 204   base::string16 group_name;
 205   for (size_t i = 0; i < plugins.size(); ++i) {
 206     if (plugins[i].path == path) {
 207       scoped_ptr<PluginMetadata> plugin_metadata(
 208           plugin_finder->GetPluginMetadata(plugins[i]));
 209       // set the group name for this plugin.
 210       group_name = plugin_metadata->name();
 211       DCHECK_EQ(enabled, IsPluginEnabled(plugins[i]));
 212       break;
 213     }
 214   }
 215
 216   bool all_disabled = true;
 217   for (size_t i = 0; i < plugins.size(); ++i) {
 218     scoped_ptr<PluginMetadata> plugin_metadata(
 219         plugin_finder->GetPluginMetadata(plugins[i]));
 220     DCHECK(!plugin_metadata->name().empty());
 221     if (group_name == plugin_metadata->name()) {
 222       all_disabled = all_disabled && !IsPluginEnabled(plugins[i]);
 223     }
 224   }
 225
 226   if (!group_name.empty()) {
 227     // Update the state for the corresponding plugin group.
 228     base::AutoLock auto_lock(lock_);
 229     plugin_group_state_[group_name] = !all_disabled;
 230   }
 231
 232   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
 233       base::Bind(&PluginPrefs::OnUpdatePreferences, this, plugins));
 234   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
 235       base::Bind(&PluginPrefs::NotifyPluginStatusChanged, this));
 236   callback.Run(true);
 237 }
 238
 239 PluginPrefs::PolicyStatus PluginPrefs::PolicyStatusForPlugin(
 240     const base::string16& name) const {
 241   base::AutoLock auto_lock(lock_);
 242   if (IsStringMatchedInSet(name, policy_enabled_plugin_patterns_)) {
 243     return POLICY_ENABLED;
 244   } else if (IsStringMatchedInSet(name, policy_disabled_plugin_patterns_) &&
 245              !IsStringMatchedInSet(
 246                  name, policy_disabled_plugin_exception_patterns_)) {
 247     return POLICY_DISABLED;
 248   } else {
 249     return NO_POLICY;
 250   }
 251 }
 252
 253 bool PluginPrefs::IsPluginEnabled(const content::WebPluginInfo& plugin) const {
 254   scoped_ptr<PluginMetadata> plugin_metadata(
 255       PluginFinder::GetInstance()->GetPluginMetadata(plugin));
 256   base::string16 group_name = plugin_metadata->name();
 257
 258   // Check if the plugin or its group is enabled by policy.
 259   PolicyStatus plugin_status = PolicyStatusForPlugin(plugin.name);
 260   PolicyStatus group_status = PolicyStatusForPlugin(group_name);
 261   if (plugin_status == POLICY_ENABLED || group_status == POLICY_ENABLED)
 262     return true;
 263
 264   // Check if the plugin or its group is disabled by policy.
 265   if (plugin_status == POLICY_DISABLED || group_status == POLICY_DISABLED)
 266     return false;
 267
 268 #if !defined(DISABLE_NACL)
 269   // If enabling NaCl, make sure the plugin is also enabled. See bug
 270   // http://code.google.com/p/chromium/issues/detail?id=81010 for more
 271   // information.
 272   // TODO(dspringer): When NaCl is on by default, remove this code.
 273   if ((plugin.name == base::ASCIIToUTF16(nacl::kNaClPluginName)) &&
 274       base::CommandLine::ForCurrentProcess()->HasSwitch(
 275           switches::kEnableNaCl)) {
 276     return true;
 277   }
 278 #endif
 279
 280   base::AutoLock auto_lock(lock_);
 281   // Check user preferences for the plugin.
 282   bool plugin_enabled = false;
 283   if (plugin_state_.Get(plugin.path, &plugin_enabled))
 284     return plugin_enabled;
 285
 286   // Check user preferences for the plugin group.
 287   std::map<base::string16, bool>::const_iterator group_it(
 288       plugin_group_state_.find(group_name));
 289   if (group_it != plugin_group_state_.end())
 290     return group_it->second;
 291
 292   // Default to enabled.
 293   return true;
 294 }
 295
 296 void PluginPrefs::UpdatePatternsAndNotify(std::set<base::string16>* patterns,
 297                                           const std::string& pref_name) {
 298   base::AutoLock auto_lock(lock_);
 299   ListValueToStringSet(prefs_->GetList(pref_name.c_str()), patterns);
 300
 301   NotifyPluginStatusChanged();
 302 }
 303
 304 /*static*/
 305 bool PluginPrefs::IsStringMatchedInSet(
 306     const base::string16& name,
 307     const std::set<base::string16>& pattern_set) {
 308   std::set<base::string16>::const_iterator pattern(pattern_set.begin());
 309   while (pattern != pattern_set.end()) {
 310     if (base::MatchPattern(name, *pattern))
 311       return true;
 312     ++pattern;
 313   }
 314
 315   return false;
 316 }
 317
 318 /* static */
 319 void PluginPrefs::ListValueToStringSet(const base::ListValue* src,
 320                                        std::set<base::string16>* dest) {
 321   DCHECK(src);
 322   DCHECK(dest);
 323   dest->clear();
 324   base::ListValue::const_iterator end(src->end());
 325   for (base::ListValue::const_iterator current(src->begin());
 326        current != end; ++current) {
 327     base::string16 plugin_name;
 328     if ((*current)->GetAsString(&plugin_name)) {
 329       dest->insert(plugin_name);
 330     }
 331   }
 332 }
 333
 334 void PluginPrefs::SetPrefs(PrefService* prefs) {
 335   prefs_ = prefs;
 336   bool update_internal_dir = false;
 337   base::FilePath last_internal_dir =
 338       prefs_->GetFilePath(prefs::kPluginsLastInternalDirectory);
 339   base::FilePath cur_internal_dir;
 340   if (PathService::Get(chrome::DIR_INTERNAL_PLUGINS, &cur_internal_dir) &&
 341       cur_internal_dir != last_internal_dir) {
 342     update_internal_dir = true;
 343     prefs_->SetFilePath(
 344         prefs::kPluginsLastInternalDirectory, cur_internal_dir);
 345   }
 346
 347   bool migrate_to_pepper_flash = false;
 348 #if defined(OS_WIN) || defined(OS_MACOSX)
 349   // If NPAPI Flash is enabled while Pepper Flash is disabled, we would like to
 350   // turn Pepper Flash on. And we want to do it once, when NPAPI is disabled in
 351   // Chrome 45.
 352   // TODO(wfh): Remove this code once it has been run by most users, around
 353   // Chrome 49 or Chrome 50. See crbug.com/514250.
 354   if (!prefs_->GetBoolean(prefs::kNpapiFlashMigratedToPepperFlash)) {
 355     prefs_->SetBoolean(prefs::kNpapiFlashMigratedToPepperFlash, true);
 356     migrate_to_pepper_flash = true;
 357   }
 358 #endif
 359
 360   {  // Scoped update of prefs::kPluginsPluginsList.
 361     ListPrefUpdate update(prefs_, prefs::kPluginsPluginsList);
 362     base::ListValue* saved_plugins_list = update.Get();
 363     if (saved_plugins_list && !saved_plugins_list->empty()) {
 364       // The following four variables are only valid when
 365       // |migrate_to_pepper_flash| is set to true.
 366       base::FilePath pepper_flash;
 367       base::DictionaryValue* pepper_flash_node = NULL;
 368       bool npapi_flash_enabled = false;
 369       if (migrate_to_pepper_flash) {
 370         PathService::Get(chrome::FILE_PEPPER_FLASH_PLUGIN, &pepper_flash);
 371       }
 372
 373       for (base::ListValue::iterator it = saved_plugins_list->begin();
 374            it != saved_plugins_list->end();
 375            ++it) {
 376         if (!(*it)->IsType(base::Value::TYPE_DICTIONARY)) {
 377           LOG(WARNING) << "Invalid entry in " << prefs::kPluginsPluginsList;
 378           continue;  // Oops, don't know what to do with this item.
 379         }
 380
 381         base::DictionaryValue* plugin =
 382             static_cast<base::DictionaryValue*>(*it);
 383         base::string16 group_name;
 384         bool enabled;
 385         if (!plugin->GetBoolean("enabled", &enabled))
 386           enabled = true;
 387
 388         base::FilePath::StringType path;
 389         // The plugin list constains all the plugin files in addition to the
 390         // plugin groups.
 391         if (plugin->GetString("path", &path)) {
 392           // Files have a path attribute, groups don't.
 393           base::FilePath plugin_path(path);
 394
 395           // The path to the internal plugin directory changes everytime Chrome
 396           // is auto-updated, since it contains the current version number. For
 397           // example, it changes from foobar\Chrome\Application\21.0.1180.83 to
 398           // foobar\Chrome\Application\21.0.1180.89.
 399           // However, we would like the settings of internal plugins to persist
 400           // across Chrome updates. Therefore, we need to recognize those paths
 401           // that are within the previous internal plugin directory, and update
 402           // them in the prefs accordingly.
 403           if (update_internal_dir) {
 404             base::FilePath relative_path;
 405
 406             // Extract the part of |plugin_path| that is relative to
 407             // |last_internal_dir|. For example, |relative_path| will be
 408             // foo\bar.dll if |plugin_path| is <last_internal_dir>\foo\bar.dll.
 409             //
 410             // Every iteration the last path component from |plugin_path| is
 411             // removed and prepended to |relative_path| until we get up to
 412             // |last_internal_dir|.
 413             while (last_internal_dir.IsParent(plugin_path)) {
 414               relative_path = plugin_path.BaseName().Append(relative_path);
 415
 416               base::FilePath old_path = plugin_path;
 417               plugin_path = plugin_path.DirName();
 418               // To be extra sure that we won't end up in an infinite loop.
 419               if (old_path == plugin_path) {
 420                 NOTREACHED();
 421                 break;
 422               }
 423             }
 424
 425             // If |relative_path| is empty, |plugin_path| is not within
 426             // |last_internal_dir|. We don't need to update it.
 427             if (!relative_path.empty()) {
 428               plugin_path = cur_internal_dir.Append(relative_path);
 429               path = plugin_path.value();
 430               plugin->SetString("path", path);
 431             }
 432           }
 433
 434           if (migrate_to_pepper_flash && IsNpapiFlashPath(plugin_path)) {
 435             npapi_flash_enabled = enabled;
 436           } else if (migrate_to_pepper_flash &&
 437                      base::FilePath::CompareEqualIgnoreCase(
 438                          path, pepper_flash.value())) {
 439             if (!enabled)
 440               pepper_flash_node = plugin;
 441           }
 442
 443           plugin_state_.Set(plugin_path, enabled);
 444         } else if (!enabled && plugin->GetString("name", &group_name)) {
 445           // Otherwise this is a list of groups.
 446           plugin_group_state_[group_name] = false;
 447         }
 448       }
 449
 450       if (npapi_flash_enabled && pepper_flash_node) {
 451         DCHECK(migrate_to_pepper_flash);
 452         pepper_flash_node->SetBoolean("enabled", true);
 453         plugin_state_.Set(pepper_flash, true);
 454       }
 455     } else {
 456       // If the saved plugin list is empty, then the call to UpdatePreferences()
 457       // below failed in an earlier run, possibly because the user closed the
 458       // browser too quickly.
 459
 460       // Only want one PDF plugin enabled at a time. See http://crbug.com/50105
 461       // for background.
 462       plugin_group_state_[base::ASCIIToUTF16(
 463           PluginMetadata::kAdobeReaderGroupName)] = false;
 464     }
 465   }  // Scoped update of prefs::kPluginsPluginsList.
 466
 467   // Build the set of policy enabled/disabled plugin patterns once and cache it.
 468   // Don't do this in the constructor, there's no profile available there.
 469   ListValueToStringSet(prefs_->GetList(prefs::kPluginsDisabledPlugins),
 470                        &policy_disabled_plugin_patterns_);
 471   ListValueToStringSet(
 472       prefs_->GetList(prefs::kPluginsDisabledPluginsExceptions),
 473       &policy_disabled_plugin_exception_patterns_);
 474   ListValueToStringSet(prefs_->GetList(prefs::kPluginsEnabledPlugins),
 475                        &policy_enabled_plugin_patterns_);
 476
 477   registrar_.Init(prefs_);
 478
 479   // Because pointers to our own members will remain unchanged for the
 480   // lifetime of |registrar_| (which we also own), we can bind their
 481   // pointer values directly in the callbacks to avoid string-based
 482   // lookups at notification time.
 483   registrar_.Add(prefs::kPluginsDisabledPlugins,
 484                  base::Bind(&PluginPrefs::UpdatePatternsAndNotify,
 485                             base::Unretained(this),
 486                             &policy_disabled_plugin_patterns_));
 487   registrar_.Add(prefs::kPluginsDisabledPluginsExceptions,
 488                  base::Bind(&PluginPrefs::UpdatePatternsAndNotify,
 489                             base::Unretained(this),
 490                             &policy_disabled_plugin_exception_patterns_));
 491   registrar_.Add(prefs::kPluginsEnabledPlugins,
 492                  base::Bind(&PluginPrefs::UpdatePatternsAndNotify,
 493                             base::Unretained(this),
 494                             &policy_enabled_plugin_patterns_));
 495
 496   NotifyPluginStatusChanged();
 497 }
 498
 499 void PluginPrefs::ShutdownOnUIThread() {
 500   prefs_ = NULL;
 501   registrar_.RemoveAll();
 502 }
 503
 504 PluginPrefs::PluginPrefs() : profile_(NULL),
 505                              prefs_(NULL) {
 506 }
 507
 508 PluginPrefs::~PluginPrefs() {
 509 }
 510
 511 void PluginPrefs::SetPolicyEnforcedPluginPatterns(
 512     const std::set<base::string16>& disabled_patterns,
 513     const std::set<base::string16>& disabled_exception_patterns,
 514     const std::set<base::string16>& enabled_patterns) {
 515   policy_disabled_plugin_patterns_ = disabled_patterns;
 516   policy_disabled_plugin_exception_patterns_ = disabled_exception_patterns;
 517   policy_enabled_plugin_patterns_ = enabled_patterns;
 518 }
 519
 520 void PluginPrefs::OnUpdatePreferences(
 521     const std::vector<content::WebPluginInfo>& plugins) {
 522   if (!prefs_)
 523     return;
 524
 525   PluginFinder* finder = PluginFinder::GetInstance();
 526   ListPrefUpdate update(prefs_, prefs::kPluginsPluginsList);
 527   base::ListValue* plugins_list = update.Get();
 528   plugins_list->Clear();
 529
 530   base::FilePath internal_dir;
 531   if (PathService::Get(chrome::DIR_INTERNAL_PLUGINS, &internal_dir))
 532     prefs_->SetFilePath(prefs::kPluginsLastInternalDirectory, internal_dir);
 533
 534   base::AutoLock auto_lock(lock_);
 535
 536   // Add the plugin files.
 537   std::set<base::string16> group_names;
 538   for (size_t i = 0; i < plugins.size(); ++i) {
 539     base::DictionaryValue* summary = new base::DictionaryValue();
 540     summary->SetString("path", plugins[i].path.value());
 541     summary->SetString("name", plugins[i].name);
 542     summary->SetString("version", plugins[i].version);
 543     bool enabled = true;
 544     plugin_state_.Get(plugins[i].path, &enabled);
 545     summary->SetBoolean("enabled", enabled);
 546     plugins_list->Append(summary);
 547
 548     scoped_ptr<PluginMetadata> plugin_metadata(
 549         finder->GetPluginMetadata(plugins[i]));
 550     // Insert into a set of all group names.
 551     group_names.insert(plugin_metadata->name());
 552   }
 553
 554   // Add the plugin groups.
 555   for (std::set<base::string16>::const_iterator it = group_names.begin();
 556       it != group_names.end(); ++it) {
 557     base::DictionaryValue* summary = new base::DictionaryValue();
 558     summary->SetString("name", *it);
 559     bool enabled = true;
 560     std::map<base::string16, bool>::iterator gstate_it =
 561         plugin_group_state_.find(*it);
 562     if (gstate_it != plugin_group_state_.end())
 563       enabled = gstate_it->second;
 564     summary->SetBoolean("enabled", enabled);
 565     plugins_list->Append(summary);
 566   }
 567 }
 568
 569 void PluginPrefs::NotifyPluginStatusChanged() {
 570   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 571   content::NotificationService::current()->Notify(
 572       chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED,
 573       content::Source<Profile>(profile_),
 574       content::NotificationService::NoDetails());
 575 }