Add GetAboutResource to DriveServiceInterface.

chrome/browser/google_apis/drive_api_service.cc

Index: chrome/browser/google_apis/drive_api_service.cc
diff --git a/chrome/browser/google_apis/drive_api_service.cc b/chrome/browser/google_apis/drive_api_service.cc
index 6f263b210dbd4e13b4a95c5390ac46872ba86e5a..8344ff30e25952ba498110c6e45233d56b380c7a 100644
--- a/chrome/browser/google_apis/drive_api_service.cc
+++ b/chrome/browser/google_apis/drive_api_service.cc
@@ -322,6 +322,15 @@ void DriveAPIService::GetAccountMetadata(
           base::Bind(&ParseAccounetMetadataAndRun, callback)));
 }
 
+void DriveAPIService::GetAboutResource(
+    const GetAboutResourceCallback& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(!callback.is_null());
+
+  // TODO(hidehiko): Implement this.
+  NOTREACHED();
+}
+
 void DriveAPIService::GetAppList(const GetAppListCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DCHECK(!callback.is_null());