Add GetAboutResource to DriveServiceInterface.

chrome/browser/google_apis/drive_api_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_GOOGLE_APIS_DRIVE_API_SERVICE_H_
 #define CHROME_BROWSER_GOOGLE_APIS_DRIVE_API_SERVICE_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 55 matching lines @@
       const std::string& search_query,
       bool shared_with_me,
       const std::string& directory_resource_id,
       const GetResourceListCallback& callback) OVERRIDE;
   virtual void GetResourceEntry(
       const std::string& resource_id,
       const GetResourceEntryCallback& callback) OVERRIDE;
 
   virtual void GetAccountMetadata(
       const GetAccountMetadataCallback& callback) OVERRIDE;
+  virtual void GetAboutResource(
+      const GetAboutResourceCallback& callback) OVERRIDE;
   virtual void GetAppList(const GetAppListCallback& callback) OVERRIDE;
   virtual void DeleteResource(
       const std::string& resource_id,
       const std::string& etag,
       const EntryActionCallback& callback) OVERRIDE;
   virtual void DownloadFile(
       const base::FilePath& virtual_path,
       const base::FilePath& local_cache_path,
       const GURL& download_url,
       const DownloadActionCallback& download_action_callback,
@@ skipping 81 matching lines @@
   ObserverList<DriveServiceObserver> observers_;
   DriveApiUrlGenerator url_generator_;
   const std::string custom_user_agent_;
 
   DISALLOW_COPY_AND_ASSIGN(DriveAPIService);
 };
 
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_DRIVE_API_SERVICE_H_