drive: Change DriveServiceInterface::GetChangeList's callback type to ChangeListCallback

chrome/browser/sync_file_system/drive_backend_v1/api_util.h

Index: chrome/browser/sync_file_system/drive_backend_v1/api_util.h
diff --git a/chrome/browser/sync_file_system/drive_backend_v1/api_util.h b/chrome/browser/sync_file_system/drive_backend_v1/api_util.h
index 42180ed17f171dde37652c425cff902c6d17b38b..200d852cf7b0a93dc0e782b1042a0fd67d8ced86 100644
--- a/chrome/browser/sync_file_system/drive_backend_v1/api_util.h
+++ b/chrome/browser/sync_file_system/drive_backend_v1/api_util.h
@@ -158,6 +158,10 @@ class APIUtil : public APIUtilInterface,
       const std::string& sync_root_resource_id,
       google_apis::GDataErrorCode error);
 
+  void DidGetChangeList(const ResourceListCallback& callback,
+                        google_apis::GDataErrorCode error,
+                        scoped_ptr<google_apis::ChangeList> change_list);
+
   void DidGetResourceList(const ResourceListCallback& callback,
                           google_apis::GDataErrorCode error,
                           scoped_ptr<google_apis::ResourceList> resource_list);