Move history extension API implementation to history dir.

chrome/browser/extensions/extension_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 36 matching lines @@
 
 class AppNotificationManager;
 class CrxInstaller;
 class ExtensionBookmarkEventRouter;
 class ExtensionBrowserEventRouter;
 class ExtensionContentSettingsStore;
 class ExtensionCookiesEventRouter;
 class ExtensionDownloadsEventRouter;
 class ExtensionFileBrowserEventRouter;
 class ExtensionGlobalError;
-class ExtensionHistoryEventRouter;
+class HistoryExtensionEventRouter;
 class ExtensionInstallUI;
 class ExtensionManagementEventRouter;
 class ExtensionPreferenceEventRouter;
 class ExtensionServiceBackend;
 class ExtensionSyncData;
 class ExtensionToolbarModel;
 class ExtensionUpdater;
 class ExtensionWebNavigationEventRouter;
 class GURL;
 class PendingExtensionManager;
@@ skipping 730 matching lines @@
   AppsPromo apps_promo_;
 
   // Coordinates the extension download and install process from the gallery.
   WebstoreInstaller webstore_installer_;
 
   // Flag to make sure event routers are only initialized once.
   bool event_routers_initialized_;
 
   scoped_ptr<ExtensionDownloadsEventRouter> downloads_event_router_;
 
-  scoped_ptr<ExtensionHistoryEventRouter> history_event_router_;
+  scoped_ptr<HistoryExtensionEventRouter> history_event_router_;
 
   scoped_ptr<ExtensionBrowserEventRouter> browser_event_router_;
 
   scoped_ptr<ExtensionPreferenceEventRouter> preference_event_router_;
 
   scoped_ptr<ExtensionBookmarkEventRouter> bookmark_event_router_;
 
   scoped_ptr<ExtensionCookiesEventRouter> cookies_event_router_;
 
   scoped_ptr<ExtensionManagementEventRouter> management_event_router_;
@@ skipping 25 matching lines @@
   ExtensionWarningSet extension_warnings_;
 
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsWithUnlimtedStorage);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsAndCheckStorageProtection);
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_