WIP: Implement 5xx Error handling.

chrome/browser/google_apis/mock_drive_service.h

Index: chrome/browser/google_apis/mock_drive_service.h
diff --git a/chrome/browser/google_apis/mock_drive_service.h b/chrome/browser/google_apis/mock_drive_service.h
index 61a2dc65f74834301d2614bb703a2041b273bd6b..82bfbe546e8d1431f578e1164cedc95e2b21eecd 100644
--- a/chrome/browser/google_apis/mock_drive_service.h
+++ b/chrome/browser/google_apis/mock_drive_service.h
@@ -87,6 +87,12 @@ class MockDriveService : public DriveServiceInterface {
   MOCK_METHOD2(ResumeUpload,
       void(const ResumeUploadParams& upload_file_info,
           const ResumeUploadCallback& callback));
+  MOCK_METHOD5(GetUploadState,
+      void(const UploadMode upload_mode,
+          const FilePath& drive_file_path,
+          const GURL& upload_url,
+          int64 content_length,
+          const ResumeUploadCallback& callback));
   MOCK_METHOD3(AuthorizeApp,
       void(const GURL& edit_url,
           const std::string& app_id,