[Sync] Move ModelType and related classes to 'syncer' namespace

chrome/browser/extensions/settings/settings_frontend.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_EXTENSIONS_SETTINGS_SETTINGS_FRONTEND_H_
 #define CHROME_BROWSER_EXTENSIONS_SETTINGS_SETTINGS_FRONTEND_H_
 #pragma once
 
 #include <string>
 
@@ skipping 31 matching lines @@
       Profile* profile);
 
   virtual ~SettingsFrontend();
 
   typedef base::Callback<void(syncer::SyncableService*)>
       SyncableServiceCallback;
   typedef base::Callback<void(ValueStore*)> StorageCallback;
 
   // Must only be called from the FILE thread. |type| should be either
   // APP_SETTINGS or EXTENSION_SETTINGS.
-  syncer::SyncableService* GetBackendForSync(syncable::ModelType type) const;
+  syncer::SyncableService* GetBackendForSync(syncer::ModelType type) const;
 
   // Runs |callback| on the FILE thread with the storage area for
   // |extension_id|.  If there is no extension with that ID, the storage area
   // will be NULL.
   void RunWithStorage(
       const std::string& extension_id,
       settings_namespace::Namespace settings_namespace,
       const StorageCallback& callback);
 
   // Deletes the settings for an extension (on the FILE thread).
@@ skipping 34 matching lines @@
     scoped_refptr<BackendWrapper> extension;
   };
   std::map<settings_namespace::Namespace, BackendWrappers> backends_;
 
   DISALLOW_COPY_AND_ASSIGN(SettingsFrontend);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_SETTINGS_SETTINGS_FRONTEND_H_