Add observers for managed user list data changes.

Update the list of supervised users in the import overlay
when the avatar of a supervised user is changed, or a new supervised user is created.

BUG=339060
TBR=bauerb@chromium.org

Review URL: https://codereview.chromium.org/140663014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251393 0039d316-1c4b-4281-b951-d872f2087c98

20 files changed, 154 insertions, 35 deletions

diff --git a/chrome/browser/managed_mode/managed_user_registration_utility.cc b/chrome/browser/managed_mode/managed_user_registration_utility.cc
index 34b02f8..82a51cc 100644
--- a/chrome/browser/managed_mode/managed_user_registration_utility.cc
+++ b/chrome/browser/managed_mode/managed_user_registration_utility.cc
@@ -64,6 +64,7 @@ class ManagedUserRegistrationUtilityImpl
   virtual void OnManagedUserAcknowledged(const std::string& managed_user_id)
       OVERRIDE;
   virtual void OnManagedUsersSyncingStopped() OVERRIDE;
+  virtual void OnManagedUsersChanged() OVERRIDE;
 
  private:
   // Fetches the managed user token when we have the device name.
@@ -270,6 +271,8 @@ void ManagedUserRegistrationUtilityImpl::OnManagedUsersSyncingStopped() {
       GoogleServiceAuthError(GoogleServiceAuthError::REQUEST_CANCELED));
 }
 
+void ManagedUserRegistrationUtilityImpl::OnManagedUsersChanged() {}
+
 void ManagedUserRegistrationUtilityImpl::FetchToken(
     const std::string& client_name) {
   token_fetcher_->Start(
diff --git a/chrome/browser/managed_mode/managed_user_sync_service.cc b/chrome/browser/managed_mode/managed_user_sync_service.cc
index a1f0f2f..18569c2 100644
--- a/chrome/browser/managed_mode/managed_user_sync_service.cc
+++ b/chrome/browser/managed_mode/managed_user_sync_service.cc
@@ -426,6 +426,8 @@ SyncError ManagedUserSyncService::ProcessSyncChanges(
         value->SetString(kChromeAvatar, managed_user.chrome_avatar());
         value->SetString(kChromeOsAvatar, managed_user.chromeos_avatar());
         dict->SetWithoutPathExpansion(managed_user.id(), value);
+
+        NotifyManagedUsersChanged();
         break;
       }
       case SyncChange::ACTION_DELETE: {
@@ -461,6 +463,12 @@ void ManagedUserSyncService::NotifyManagedUsersSyncingStopped() {
                     OnManagedUsersSyncingStopped());
 }
 
+void ManagedUserSyncService::NotifyManagedUsersChanged() {
+  FOR_EACH_OBSERVER(ManagedUserSyncServiceObserver,
+                    observers_,
+                    OnManagedUsersChanged());
+}
+
 void ManagedUserSyncService::DispatchCallbacks() {
   const base::DictionaryValue* managed_users =
       prefs_->GetDictionary(prefs::kManagedUsers);
diff --git a/chrome/browser/managed_mode/managed_user_sync_service.h b/chrome/browser/managed_mode/managed_user_sync_service.h
index 5bd5a7d..91689f4 100644
--- a/chrome/browser/managed_mode/managed_user_sync_service.h
+++ b/chrome/browser/managed_mode/managed_user_sync_service.h
@@ -119,6 +119,7 @@ class ManagedUserSyncService : public BrowserContextKeyedService,
 
   void NotifyManagedUserAcknowledged(const std::string& managed_user_id);
   void NotifyManagedUsersSyncingStopped();
+  void NotifyManagedUsersChanged();
 
   void DispatchCallbacks();
 
diff --git a/chrome/browser/managed_mode/managed_user_sync_service_observer.h b/chrome/browser/managed_mode/managed_user_sync_service_observer.h
index 621d841..a70cfec 100644
--- a/chrome/browser/managed_mode/managed_user_sync_service_observer.h
+++ b/chrome/browser/managed_mode/managed_user_sync_service_observer.h
@@ -14,6 +14,8 @@ class ManagedUserSyncServiceObserver {
 
   virtual void OnManagedUsersSyncingStopped() = 0;
 
+  virtual void OnManagedUsersChanged() = 0;
+
  protected:
   virtual ~ManagedUserSyncServiceObserver() {}
 };
diff --git a/chrome/browser/resources/options/managed_user_import.js b/chrome/browser/resources/options/managed_user_import.js
index 157910b..e766d64 100644
--- a/chrome/browser/resources/options/managed_user_import.js
+++ b/chrome/browser/resources/options/managed_user_import.js
@@ -76,6 +76,7 @@ cr.define('options', function() {
     didShowPage: function() {
       options.ManagedUserListData.requestExistingManagedUsers().then(
           this.receiveExistingManagedUsers_, this.onSigninError_.bind(this));
+      options.ManagedUserListData.addObserver(this);
 
       this.updateImportInProgress_(false);
       $('managed-user-import-error-bubble').hidden = true;
@@ -92,6 +93,13 @@ cr.define('options', function() {
     },
 
     /**
+     * @override
+     */
+    didClosePage: function() {
+      options.ManagedUserListData.removeObserver(this);
+    },
+
+    /**
      * Called when the user clicks the "OK" button. In case the managed
      * user being imported has no avatar in sync, it shows the avatar
      * icon grid. In case the avatar grid is visible or the managed user
diff --git a/chrome/browser/resources/options/managed_user_list_data.js b/chrome/browser/resources/options/managed_user_list_data.js
index 5f520a1..91619ed 100644
--- a/chrome/browser/resources/options/managed_user_list_data.js
+++ b/chrome/browser/resources/options/managed_user_list_data.js
@@ -12,7 +12,9 @@ cr.define('options', function() {
    * @constructor
    * @class
    */
-  function ManagedUserListData() {};
+  function ManagedUserListData() {
+    this.observers_ = [];
+  };
 
   cr.addSingletonGetter(ManagedUserListData);
 
@@ -31,7 +33,10 @@ cr.define('options', function() {
    */
   ManagedUserListData.prototype.receiveExistingManagedUsers_ = function(
       managedUsers) {
-    assert(this.promise_);
+    if (!this.promise_) {
+      this.onDataChanged_(managedUsers);
+      return;
+    }
     this.resolve_(managedUsers);
   };
 
@@ -86,10 +91,51 @@ cr.define('options', function() {
     this.promise_ = null;
   };
 
+  /**
+   * Initializes |promise| with the new data and also passes the new data to
+   * observers.
+   * @param {Array.<Object>} managedUsers An array of managed user objects.
+   *     For the format of the objects, see receiveExistingManagedUsers_().
+   * @private
+   */
+  ManagedUserListData.prototype.onDataChanged_ = function(managedUsers) {
+    this.promise_ = this.createPromise_();
+    this.resolve_(managedUsers);
+    for (var i = 0; i < this.observers_.length; ++i)
+      this.observers_[i].receiveExistingManagedUsers_(managedUsers);
+  };
+
+  /**
+   * Adds an observer to the list of observers.
+   * @param {Object} observer The observer to be added.
+   * @private
+   */
+  ManagedUserListData.prototype.addObserver_ = function(observer) {
+    for (var i = 0; i < this.observers_.length; ++i)
+      assert(this.observers_[i] != observer);
+    this.observers_.push(observer);
+  };
+
+  /**
+   * Removes an observer from the list of observers.
+   * @param {Object} observer The observer to be removed.
+   * @private
+   */
+  ManagedUserListData.prototype.removeObserver_ = function(observer) {
+    for (var i = 0; i < this.observers_.length; ++i) {
+      if (this.observers_[i] == observer) {
+        this.observers_.splice(i, 1);
+        return;
+      }
+    }
+  };
+
   // Forward public APIs to private implementations.
   [
+    'addObserver',
     'onSigninError',
     'receiveExistingManagedUsers',
+    'removeObserver',
     'requestExistingManagedUsers',
     'resetPromise',
   ].forEach(function(name) {
diff --git a/chrome/browser/ui/webui/options/browser_options_handler.h b/chrome/browser/ui/webui/options/browser_options_handler.h
index c456c17..a503fc7 100644
--- a/chrome/browser/ui/webui/options/browser_options_handler.h
+++ b/chrome/browser/ui/webui/options/browser_options_handler.h
@@ -20,6 +20,7 @@
 #include "chrome/browser/sync/profile_sync_service_observer.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
+#include "content/public/browser/notification_observer.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 #include "ui/base/models/table_model_observer.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
@@ -52,7 +53,8 @@ class BrowserOptionsHandler
 #if defined(OS_CHROMEOS)
       public chromeos::system::PointerDeviceObserver::Observer,
 #endif
-      public TemplateURLServiceObserver {
+      public TemplateURLServiceObserver,
+      public content::NotificationObserver {
  public:
   BrowserOptionsHandler();
   virtual ~BrowserOptionsHandler();
diff --git a/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.cc b/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.cc
index b8f46fd..334fd1b 100644
--- a/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.cc
@@ -404,7 +404,6 @@ void ChangePictureOptionsHandler::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
-  OptionsPageUIHandler::Observe(type, source, details);
   if (type == chrome::NOTIFICATION_PROFILE_IMAGE_UPDATED) {
     // User profile image has been updated.
     SendProfileImage(*content::Details<const gfx::ImageSkia>(details).ptr(),
diff --git a/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h b/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h
index 890d0b1..f653b71 100644
--- a/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h
+++ b/chrome/browser/ui/webui/options/chromeos/change_picture_options_handler.h
@@ -8,6 +8,7 @@
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/image_decoder.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
+#include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/native_widget_types.h"
@@ -27,6 +28,7 @@ namespace options {
 // ChromeOS user image options page UI handler.
 class ChangePictureOptionsHandler : public ::options::OptionsPageUIHandler,
                                     public ui::SelectFileDialog::Listener,
+                                    public content::NotificationObserver,
                                     public ImageDecoder::Delegate {
  public:
   ChangePictureOptionsHandler();
diff --git a/chrome/browser/ui/webui/options/chromeos/internet_options_handler.cc b/chrome/browser/ui/webui/options/chromeos/internet_options_handler.cc
index c434f4b..80f2192 100644
--- a/chrome/browser/ui/webui/options/chromeos/internet_options_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/internet_options_handler.cc
@@ -1354,7 +1354,6 @@ void InternetOptionsHandler::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
-  OptionsPageUIHandler::Observe(type, source, details);
   if (type == chrome::NOTIFICATION_REQUIRE_PIN_SETTING_CHANGE_ENDED) {
     base::FundamentalValue require_pin(*content::Details<bool>(details).ptr());
     web_ui()->CallJavascriptFunction(
diff --git a/chrome/browser/ui/webui/options/chromeos/internet_options_handler.h b/chrome/browser/ui/webui/options/chromeos/internet_options_handler.h
index 563778b..7b44e49 100644
--- a/chrome/browser/ui/webui/options/chromeos/internet_options_handler.h
+++ b/chrome/browser/ui/webui/options/chromeos/internet_options_handler.h
@@ -12,6 +12,7 @@
 #include "chrome/browser/ui/webui/options/options_ui.h"
 #include "chromeos/login/login_state.h"
 #include "chromeos/network/network_state_handler_observer.h"
+#include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ -38,7 +39,8 @@ namespace options {
 class InternetOptionsHandler
     : public ::options::OptionsPageUIHandler,
       public chromeos::NetworkStateHandlerObserver,
-      public chromeos::LoginState::Observer {
+      public chromeos::LoginState::Observer,
+      public content::NotificationObserver {
  public:
   InternetOptionsHandler();
   virtual ~InternetOptionsHandler();
@@ -100,7 +102,7 @@ class InternetOptionsHandler
   // Updates the logged in user type.
   void UpdateLoggedInUserType();
 
-  // content::NotificationObserver (from OptionsPageUIHandler)
+  // content::NotificationObserver
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
diff --git a/chrome/browser/ui/webui/options/content_settings_handler.cc b/chrome/browser/ui/webui/options/content_settings_handler.cc
index 76b0d4e..7850af2 100644
--- a/chrome/browser/ui/webui/options/content_settings_handler.cc
+++ b/chrome/browser/ui/webui/options/content_settings_handler.cc
@@ -545,9 +545,6 @@ void ContentSettingsHandler::Observe(
       UpdateHandlersEnabledRadios();
       break;
     }
-
-    default:
-      OptionsPageUIHandler::Observe(type, source, details);
   }
 }
 
diff --git a/chrome/browser/ui/webui/options/content_settings_handler.h b/chrome/browser/ui/webui/options/content_settings_handler.h
index b6ddfaf..b5453de 100644
--- a/chrome/browser/ui/webui/options/content_settings_handler.h
+++ b/chrome/browser/ui/webui/options/content_settings_handler.h
@@ -23,6 +23,7 @@ class ProtocolHandlerRegistry;
 namespace options {
 
 class ContentSettingsHandler : public OptionsPageUIHandler,
+                               public content::NotificationObserver,
                                public PepperFlashSettingsManager::Client {
  public:
   ContentSettingsHandler();
diff --git a/chrome/browser/ui/webui/options/font_settings_handler.h b/chrome/browser/ui/webui/options/font_settings_handler.h
index 276c8a4..3a9c8d8 100644
--- a/chrome/browser/ui/webui/options/font_settings_handler.h
+++ b/chrome/browser/ui/webui/options/font_settings_handler.h
@@ -8,6 +8,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_member.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
+#include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 namespace base {
@@ -21,7 +22,8 @@ class Extension;
 namespace options {
 
 // Font settings overlay page UI handler.
-class FontSettingsHandler : public OptionsPageUIHandler {
+class FontSettingsHandler : public OptionsPageUIHandler,
+                            public content::NotificationObserver {
  public:
   FontSettingsHandler();
   virtual ~FontSettingsHandler();
@@ -36,7 +38,7 @@ class FontSettingsHandler : public OptionsPageUIHandler {
   virtual void RegisterMessages() OVERRIDE;
 
  private:
-  // OptionsPageUIHandler implementation.
+  // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
diff --git a/chrome/browser/ui/webui/options/handler_options_handler.h b/chrome/browser/ui/webui/options/handler_options_handler.h
index 93dd59d..7c6f12e 100644
--- a/chrome/browser/ui/webui/options/handler_options_handler.h
+++ b/chrome/browser/ui/webui/options/handler_options_handler.h
@@ -10,6 +10,7 @@
 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
 #include "chrome/common/custom_handlers/protocol_handler.h"
+#include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -25,7 +26,8 @@ class DictionaryValue;
 
 namespace options {
 
-class HandlerOptionsHandler : public OptionsPageUIHandler {
+class HandlerOptionsHandler : public OptionsPageUIHandler,
+                              public content::NotificationObserver {
  public:
   HandlerOptionsHandler();
   virtual ~HandlerOptionsHandler();
diff --git a/chrome/browser/ui/webui/options/manage_profile_handler.cc b/chrome/browser/ui/webui/options/manage_profile_handler.cc
index b2fd4cc..aeb1ee3 100644
--- a/chrome/browser/ui/webui/options/manage_profile_handler.cc
+++ b/chrome/browser/ui/webui/options/manage_profile_handler.cc
@@ -193,8 +193,6 @@ void ManageProfileHandler::Observe(
     SendProfileNames();
     base::StringValue value(kManageProfileIconGridName);
     SendProfileIcons(value);
-  } else {
-    OptionsPageUIHandler::Observe(type, source, details);
   }
 }
 
diff --git a/chrome/browser/ui/webui/options/manage_profile_handler.h b/chrome/browser/ui/webui/options/manage_profile_handler.h
index 90c9820..d4286e3 100644
--- a/chrome/browser/ui/webui/options/manage_profile_handler.h
+++ b/chrome/browser/ui/webui/options/manage_profile_handler.h
@@ -11,6 +11,7 @@
 #include "base/prefs/pref_change_registrar.h"
 #include "chrome/browser/sync/profile_sync_service_observer.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
+#include "content/public/browser/notification_observer.h"
 
 namespace base {
 class StringValue;
@@ -20,6 +21,7 @@ namespace options {
 
 // Chrome personal stuff profiles manage overlay UI handler.
 class ManageProfileHandler : public OptionsPageUIHandler,
+                             public content::NotificationObserver,
                              public ProfileSyncServiceObserver {
  public:
   ManageProfileHandler();
diff --git a/chrome/browser/ui/webui/options/managed_user_import_handler.cc b/chrome/browser/ui/webui/options/managed_user_import_handler.cc
index 3eb5399..6787aff 100644
--- a/chrome/browser/ui/webui/options/managed_user_import_handler.cc
+++ b/chrome/browser/ui/webui/options/managed_user_import_handler.cc
@@ -48,10 +48,18 @@ scoped_ptr<base::ListValue> GetAvatarIcons() {
 namespace options {
 
 ManagedUserImportHandler::ManagedUserImportHandler()
-    : weak_ptr_factory_(this) {
-}
+    : weak_ptr_factory_(this) {}
 
-ManagedUserImportHandler::~ManagedUserImportHandler() {}
+ManagedUserImportHandler::~ManagedUserImportHandler() {
+  Profile* profile = Profile::FromWebUI(web_ui());
+  if (!profile->IsManaged()) {
+    ManagedUserSyncService* service =
+        ManagedUserSyncServiceFactory::GetForProfile(profile);
+    if (service)
+      service->RemoveObserver(this);
+    subscription_.reset();
+  }
+}
 
 void ManagedUserImportHandler::GetLocalizedValues(
     base::DictionaryValue* localized_strings) {
@@ -76,8 +84,17 @@ void ManagedUserImportHandler::GetLocalizedValues(
 }
 
 void ManagedUserImportHandler::InitializeHandler() {
+  Profile* profile = Profile::FromWebUI(web_ui());
   registrar_.Add(this, chrome::NOTIFICATION_GLOBAL_ERRORS_CHANGED,
-                 content::Source<Profile>(Profile::FromWebUI(web_ui())));
+                 content::Source<Profile>(profile));
+  if (!profile->IsManaged()) {
+    ManagedUserSyncServiceFactory::GetForProfile(profile)->AddObserver(this);
+    subscription_ =
+        ManagedUserSharedSettingsServiceFactory::GetForBrowserContext(profile)
+            ->Subscribe(
+                base::Bind(&ManagedUserImportHandler::OnSharedSettingChanged,
+                           weak_ptr_factory_.GetWeakPtr()));
+  }
 }
 
 void ManagedUserImportHandler::RegisterMessages() {
@@ -93,14 +110,18 @@ void ManagedUserImportHandler::Observe(
   if (type == chrome::NOTIFICATION_GLOBAL_ERRORS_CHANGED) {
     SigninGlobalError* error =
         SigninGlobalError::GetForProfile(Profile::FromWebUI(web_ui()));
-    if (content::Details<SigninGlobalError>(details).ptr() != error)
-      return;
-
-    RequestManagedUserImportUpdate(NULL);
-    return;
+    if (content::Details<SigninGlobalError>(details).ptr() == error)
+      FetchManagedUsers();
   }
+}
+
+void ManagedUserImportHandler::OnManagedUsersChanged() {
+  FetchManagedUsers();
+}
 
-  OptionsPageUIHandler::Observe(type, source, details);
+void ManagedUserImportHandler::FetchManagedUsers() {
+  web_ui()->CallJavascriptFunction("options.ManagedUserListData.resetPromise");
+  RequestManagedUserImportUpdate(NULL);
 }
 
 void ManagedUserImportHandler::RequestManagedUserImportUpdate(
@@ -208,4 +229,11 @@ bool ManagedUserImportHandler::HasAuthError() const {
       state == GoogleServiceAuthError::ACCOUNT_DISABLED;
 }
 
+void ManagedUserImportHandler::OnSharedSettingChanged(
+    const std::string& managed_user_id,
+    const std::string& key) {
+  if (key == managed_users::kChromeAvatarIndex)
+    FetchManagedUsers();
+}
+
 }  // namespace options
diff --git a/chrome/browser/ui/webui/options/managed_user_import_handler.h b/chrome/browser/ui/webui/options/managed_user_import_handler.h
index dafb416..55dbd9c 100644
--- a/chrome/browser/ui/webui/options/managed_user_import_handler.h
+++ b/chrome/browser/ui/webui/options/managed_user_import_handler.h
@@ -5,7 +5,9 @@
 #ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_MANAGED_USER_IMPORT_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_MANAGED_USER_IMPORT_HANDLER_H_
 
+#include "base/callback_list.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/managed_mode/managed_user_sync_service_observer.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -18,8 +20,13 @@ class ListValue;
 namespace options {
 
 // Handler for the 'import existing managed user' dialog.
-class ManagedUserImportHandler : public OptionsPageUIHandler {
+class ManagedUserImportHandler : public OptionsPageUIHandler,
+                                 public content::NotificationObserver,
+                                 public ManagedUserSyncServiceObserver {
  public:
+  typedef base::CallbackList<void(const std::string&, const std::string&)>
+      CallbackList;
+
   ManagedUserImportHandler();
   virtual ~ManagedUserImportHandler();
 
@@ -35,7 +42,18 @@ class ManagedUserImportHandler : public OptionsPageUIHandler {
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
+
+  // ManagedUserSyncServiceObserver implementation.
+  virtual void OnManagedUserAcknowledged(const std::string& managed_user_id)
+      OVERRIDE {}
+  virtual void OnManagedUsersSyncingStopped() OVERRIDE {}
+  virtual void OnManagedUsersChanged() OVERRIDE;
+
  private:
+  // Clears the cached list of managed users and fetches the new list of managed
+  // users.
+  void FetchManagedUsers();
+
   // Callback for the "requestManagedUserImportUpdate" message.
   // Checks the sign-in status of the custodian and accordingly
   // sends an update to the WebUI. The update can be to show/hide
@@ -61,6 +79,13 @@ class ManagedUserImportHandler : public OptionsPageUIHandler {
   bool IsAccountConnected() const;
   bool HasAuthError() const;
 
+  // Called when a managed user shared setting is changed. If the avatar was
+  // changed, FetchManagedUsers() is called.
+  void OnSharedSettingChanged(const std::string& managed_user_id,
+                              const std::string& key);
+
+  scoped_ptr<CallbackList::Subscription> subscription_;
+
   base::WeakPtrFactory<ManagedUserImportHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ManagedUserImportHandler);
diff --git a/chrome/browser/ui/webui/options/options_ui.h b/chrome/browser/ui/webui/options/options_ui.h
index 8117ed6..609eb33 100644
--- a/chrome/browser/ui/webui/options/options_ui.h
+++ b/chrome/browser/ui/webui/options/options_ui.h
@@ -10,9 +10,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
-#include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/notification_types.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_ui_controller.h"
 #include "content/public/browser/web_ui_message_handler.h"
@@ -37,8 +35,7 @@ class PointerDeviceObserver;
 namespace options {
 
 // The base class handler of Javascript messages of options pages.
-class OptionsPageUIHandler : public content::WebUIMessageHandler,
-                             public content::NotificationObserver {
+class OptionsPageUIHandler : public content::WebUIMessageHandler {
  public:
   // Key for identifying the Settings App localized_strings in loadTimeData.
   static const char kSettingsAppKey[];
@@ -70,11 +67,6 @@ class OptionsPageUIHandler : public content::WebUIMessageHandler,
   // WebUIMessageHandler implementation.
   virtual void RegisterMessages() OVERRIDE {}
 
-  // content::NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE {}
-
  protected:
   struct OptionsStringResource {
     // The name of the resource in templateData.