Add a callback to RemoteFileSyncService for reporting errors.

chrome/browser/sync_file_system/mock_remote_file_sync_service.h

Index: chrome/browser/sync_file_system/mock_remote_file_sync_service.h
diff --git a/chrome/browser/sync_file_system/mock_remote_file_sync_service.h b/chrome/browser/sync_file_system/mock_remote_file_sync_service.h
index 1c96e49a9060b1a5ace3de5de8ceb9839e29aa6f..5ca98d5f3ea08367bc73b8370d78e0417e5f64e5 100644
--- a/chrome/browser/sync_file_system/mock_remote_file_sync_service.h
+++ b/chrome/browser/sync_file_system/mock_remote_file_sync_service.h
@@ -23,8 +23,12 @@ class MockRemoteFileSyncService : public RemoteFileSyncService {
   // RemoteFileSyncService overrides.
   MOCK_METHOD1(AddObserver, void(RemoteFileSyncService::Observer* observer));
   MOCK_METHOD1(RemoveObserver, void(RemoteFileSyncService::Observer* observer));
-  MOCK_METHOD1(RegisterOriginForTrackingChanges, void(const GURL& origin));
-  MOCK_METHOD1(UnregisterOriginForTrackingChanges, void(const GURL& origin));
+  MOCK_METHOD2(RegisterOriginForTrackingChanges,
+               void(const GURL& origin,
+                    const fileapi::SyncStatusCallback& callback));
+  MOCK_METHOD2(UnregisterOriginForTrackingChanges,
+               void(const GURL& origin,
+                    const fileapi::SyncStatusCallback& callback));
   MOCK_METHOD2(ProcessRemoteChange,
                void(RemoteChangeProcessor* processor,
                     const fileapi::SyncFileCallback& callback));