Explicitly ShutdownOnUIThread the HostContentSettingsMap when destroying the Profile.

chrome/browser/content_settings/host_content_settings_map.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 
 #include <list>
 
 #include "base/command_line.h"
 #include "base/string_util.h"
@@ skipping 51 matching lines @@
 
 const char* kProviderNames[] = {
   "policy",
   "extension",
   "preference"
 };
 
 }  // namespace
 
 HostContentSettingsMap::HostContentSettingsMap(Profile* profile)
-    : profile_(profile),
-      is_off_the_record_(profile_->IsOffTheRecord()),
+    : prefs_(profile->GetPrefs()),
+      is_off_the_record_(profile->IsOffTheRecord()),
       updating_preferences_(false),
       block_third_party_cookies_(false),
       is_block_third_party_cookies_managed_(false) {
   // The order in which the default content settings providers are created is
   // critical, as providers that are further down in the list (i.e. added later)
   // override providers further up.
   default_content_settings_providers_.push_back(
-      make_linked_ptr(new content_settings::PrefDefaultProvider(profile)));
+      make_linked_ptr(new content_settings::PrefDefaultProvider(
+          this, prefs_, is_off_the_record_)));
   content_settings::DefaultProviderInterface* policy_default_provider =
-      new content_settings::PolicyDefaultProvider(profile);
+      new content_settings::PolicyDefaultProvider(this, prefs_);
   default_content_settings_providers_.push_back(
       make_linked_ptr(policy_default_provider));
 
-  PrefService* prefs = profile_->GetPrefs();
-
   // TODO(markusheintz): Discuss whether it is sensible to move migration code
   // to PrefContentSettingsProvider.
-  MigrateObsoleteCookiePref(prefs);
+  MigrateObsoleteCookiePref();
 
   // Read misc. global settings.
   block_third_party_cookies_ =
-      prefs->GetBoolean(prefs::kBlockThirdPartyCookies);
+      prefs_->GetBoolean(prefs::kBlockThirdPartyCookies);
   if (block_third_party_cookies_) {
     UserMetrics::RecordAction(
         UserMetricsAction("ThirdPartyCookieBlockingEnabled"));
   } else {
     UserMetrics::RecordAction(
         UserMetricsAction("ThirdPartyCookieBlockingDisabled"));
   }
   is_block_third_party_cookies_managed_ =
-      prefs->IsManagedPreference(prefs::kBlockThirdPartyCookies);
+      prefs_->IsManagedPreference(prefs::kBlockThirdPartyCookies);
 
   // User defined non default content settings are provided by the PrefProvider.
   // The order in which the content settings providers are created is critical,
   // as providers that are further up in the list (i.e. added earlier) override
   // providers further down.
   content_settings_providers_.push_back(make_linked_ptr(
-      new content_settings::PolicyProvider(profile, policy_default_provider)));
+      new content_settings::PolicyProvider(this,
+                                           prefs_,
+                                           policy_default_provider)));
   ExtensionService* extension_service = profile->GetExtensionService();
   if (extension_service) {
     // |extension_service| can be NULL in unit tests.
     content_settings_providers_.push_back(make_linked_ptr(
         new content_settings::ExtensionProvider(
             this,
             extension_service->GetExtensionContentSettingsStore(),
             is_off_the_record_)));
   }
-  content_settings_providers_.push_back(
-      make_linked_ptr(new content_settings::PrefProvider(profile)));
+  content_settings_providers_.push_back(make_linked_ptr(
+      new content_settings::PrefProvider(this, prefs_, is_off_the_record_)));
 
-  pref_change_registrar_.Init(prefs);
+  pref_change_registrar_.Init(prefs_);
   pref_change_registrar_.Add(prefs::kBlockThirdPartyCookies, this);
-  notification_registrar_.Add(this, NotificationType::PROFILE_DESTROYED,
-                              Source<Profile>(profile_));
 }
 
 // static
 void HostContentSettingsMap::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterBooleanPref(prefs::kBlockThirdPartyCookies,
                              false,
                              PrefService::SYNCABLE_PREF);
   prefs->RegisterIntegerPref(prefs::kContentSettingsWindowLastTabIndex,
                              0,
                              PrefService::UNSYNCABLE_PREF);
@@ skipping 277 matching lines @@
     case CONTENT_SETTINGS_TYPE_GEOLOCATION:
     case CONTENT_SETTINGS_TYPE_NOTIFICATIONS:
       return (setting == CONTENT_SETTING_ASK);
     default:
       return false;
   }
 }
 
 void HostContentSettingsMap::SetBlockThirdPartyCookies(bool block) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(prefs_);
 
   // This setting may not be directly modified for OTR sessions.  Instead, it
   // is synced to the main profile's setting.
   if (is_off_the_record_) {
     NOTREACHED();
     return;
   }
 
-  PrefService* prefs = profile_->GetPrefs();
   // If the preference block-third-party-cookies is managed then do not allow to
   // change it.
-  if (prefs->IsManagedPreference(prefs::kBlockThirdPartyCookies)) {
+  if (prefs_->IsManagedPreference(prefs::kBlockThirdPartyCookies)) {
     NOTREACHED();
     return;
   }
 
   {
     base::AutoLock auto_lock(lock_);
     block_third_party_cookies_ = block;
   }
 
-  profile_->GetPrefs()->SetBoolean(prefs::kBlockThirdPartyCookies, block);
+  prefs_->SetBoolean(prefs::kBlockThirdPartyCookies, block);
 }
 
 void HostContentSettingsMap::ResetToDefaults() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   {
     base::AutoLock auto_lock(lock_);
     for (DefaultProviderIterator provider =
              default_content_settings_providers_.begin();
          provider != default_content_settings_providers_.end(); ++provider) {
       (*provider)->ResetToDefaults();
     }
 
     for (ProviderIterator provider = content_settings_providers_.begin();
          provider != content_settings_providers_.end();
          ++provider) {
       (*provider)->ResetToDefaults();
     }
 
     // Don't reset block third party cookies if they are managed.
     if (!IsBlockThirdPartyCookiesManaged())
       block_third_party_cookies_ = false;
   }
 
   if (!is_off_the_record_) {
-    PrefService* prefs = profile_->GetPrefs();
+    DCHECK(prefs_);
     updating_preferences_ = true;
     // If the block third party cookies preference is managed we still must
     // clear it in order to restore the default value for later when the
     // preference is not managed anymore.
-    prefs->ClearPref(prefs::kBlockThirdPartyCookies);
+    prefs_->ClearPref(prefs::kBlockThirdPartyCookies);
     updating_preferences_ = false;
   }
 }
 
 void HostContentSettingsMap::Observe(NotificationType type,
                                      const NotificationSource& source,
                                      const NotificationDetails& details) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   if (type == NotificationType::PREF_CHANGED) {
-    DCHECK_EQ(profile_->GetPrefs(), Source<PrefService>(source).ptr());
+    DCHECK_EQ(prefs_, Source<PrefService>(source).ptr());
     if (updating_preferences_)
       return;
 
     std::string* name = Details<std::string>(details).ptr();
     if (*name == prefs::kBlockThirdPartyCookies) {
       base::AutoLock auto_lock(lock_);
-      block_third_party_cookies_ = profile_->GetPrefs()->GetBoolean(
+      block_third_party_cookies_ = prefs_->GetBoolean(
           prefs::kBlockThirdPartyCookies);
       is_block_third_party_cookies_managed_ =
-          profile_->GetPrefs()->IsManagedPreference(
+          prefs_->IsManagedPreference(
               prefs::kBlockThirdPartyCookies);
     } else {
       NOTREACHED() << "Unexpected preference observed";
       return;
     }
-  } else if (type == NotificationType::PROFILE_DESTROYED) {
-    DCHECK_EQ(profile_, Source<Profile>(source).ptr());
-    UnregisterObservers();
   } else {
     NOTREACHED() << "Unexpected notification";
   }
 }
 
 HostContentSettingsMap::~HostContentSettingsMap() {
-  UnregisterObservers();
+  DCHECK(!prefs_);
 }
 
 bool HostContentSettingsMap::IsDefaultContentSettingManaged(
     ContentSettingsType content_type) const {
   for (ConstDefaultProviderIterator provider =
            default_content_settings_providers_.begin();
        provider != default_content_settings_providers_.end(); ++provider) {
     if ((*provider)->DefaultSettingIsManaged(content_type))
       return true;
   }
   return false;
 }
 
 void HostContentSettingsMap::ShutdownOnUIThread() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  if (!prefs_)
+    return;
+  pref_change_registrar_.RemoveAll();
+  prefs_ = NULL;
   for (ProviderIterator it = content_settings_providers_.begin();
        it != content_settings_providers_.end();
        ++it) {
     (*it)->ShutdownOnUIThread();
   }
+  for (DefaultProviderIterator it = default_content_settings_providers_.begin();
+       it != default_content_settings_providers_.end();
+       ++it) {
+    (*it)->ShutdownOnUIThread();
+  }
 }
 
-void HostContentSettingsMap::UnregisterObservers() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  if (!profile_)
-    return;
-  pref_change_registrar_.RemoveAll();
-  notification_registrar_.Remove(this, NotificationType::PROFILE_DESTROYED,
-                                 Source<Profile>(profile_));
-  profile_ = NULL;
-}
-
-void HostContentSettingsMap::MigrateObsoleteCookiePref(PrefService* prefs) {
-  if (prefs->HasPrefPath(prefs::kCookieBehavior)) {
-    int cookie_behavior = prefs->GetInteger(prefs::kCookieBehavior);
-    prefs->ClearPref(prefs::kCookieBehavior);
-    if (!prefs->HasPrefPath(prefs::kDefaultContentSettings)) {
+void HostContentSettingsMap::MigrateObsoleteCookiePref() {
+  if (prefs_->HasPrefPath(prefs::kCookieBehavior)) {
+    int cookie_behavior = prefs_->GetInteger(prefs::kCookieBehavior);
+    prefs_->ClearPref(prefs::kCookieBehavior);
+    if (!prefs_->HasPrefPath(prefs::kDefaultContentSettings)) {
         SetDefaultContentSetting(CONTENT_SETTINGS_TYPE_COOKIES,
             (cookie_behavior == net::StaticCookiePolicy::BLOCK_ALL_COOKIES) ?
                 CONTENT_SETTING_BLOCK : CONTENT_SETTING_ALLOW);
     }
-    if (!prefs->HasPrefPath(prefs::kBlockThirdPartyCookies)) {
+    if (!prefs_->HasPrefPath(prefs::kBlockThirdPartyCookies)) {
       SetBlockThirdPartyCookies(cookie_behavior ==
           net::StaticCookiePolicy::BLOCK_SETTING_THIRD_PARTY_COOKIES);
     }
   }
 }