[Sync] Add support for automatic enabling of syncing tab favicons.

chrome/browser/sync/profile_sync_service.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 #pragma once
 
 #include <list>
 #include <string>
@@ skipping 17 matching lines @@
 #include "chrome/browser/sync/profile_sync_service_observer.h"
 #include "chrome/browser/sync/sync_prefs.h"
 #include "chrome/common/net/gaia/google_service_auth_error.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_types.h"
 #include "googleurl/src/gurl.h"
 #include "sync/engine/model_safe_worker.h"
 #include "sync/js/sync_js_controller.h"
 #include "sync/syncable/model_type.h"
+#include "sync/util/sync_experiments.h"
 #include "sync/util/unrecoverable_error_handler.h"
 
 class Profile;
 class ProfileSyncComponentsFactory;
 class SigninManager;
 class SyncGlobalError;
 
 namespace browser_sync {
 class BackendMigrator;
 class ChangeProcessor;
@@ skipping 180 matching lines @@
   virtual void OnPassphraseRequired(
       sync_api::PassphraseRequiredReason reason,
       const sync_pb::EncryptedData& pending_keys) OVERRIDE;
   virtual void OnPassphraseAccepted() OVERRIDE;
   virtual void OnEncryptedTypesChanged(
       syncable::ModelTypeSet encrypted_types,
       bool encrypt_everything) OVERRIDE;
   virtual void OnEncryptionComplete() OVERRIDE;
   virtual void OnMigrationNeededForTypes(
       syncable::ModelTypeSet types) OVERRIDE;
-  virtual void OnDataTypesChanged(
-      syncable::ModelTypeSet to_add) OVERRIDE;
+  virtual void OnExperimentsChanged(
+      const browser_sync::SyncExperiments& experiments) OVERRIDE;
   virtual void OnActionableError(
       const browser_sync::SyncProtocolError& error) OVERRIDE;
 
   void OnClearServerDataTimeout();
 
   // Update the last auth error and notify observers of error state.
   void UpdateAuthErrorState(const GoogleServiceAuthError& error);
 
   // Called when a user chooses which data types to sync as part of the sync
   // setup wizard.  |sync_everything| represents whether they chose the
@@ skipping 488 matching lines @@
 
   scoped_ptr<browser_sync::BackendUnrecoverableErrorHandler>
       backend_unrecoverable_error_handler_;
 
   browser_sync::DataTypeManager::ConfigureStatus configure_status_;
 
   // If |true|, there is setup UI visible so we should not start downloading
   // data types.
   bool setup_in_progress_;
 
+  // The set of currently enabled sync experiments.
+  browser_sync::SyncExperiments current_experiments;
+
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncService);
 };
 
 bool ShouldShowActionOnUI(
     const browser_sync::SyncProtocolError& error);
 
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_