WIP: Implement 5xx Error handling.

chrome/browser/google_apis/drive_api_service.h

Index: chrome/browser/google_apis/drive_api_service.h
diff --git a/chrome/browser/google_apis/drive_api_service.h b/chrome/browser/google_apis/drive_api_service.h
index 92b7b2ddb0eda98fb55adec55c4284bff9939f8f..3fda6d0d3c13bd523c5906bfc94a4f0d11c6622e 100644
--- a/chrome/browser/google_apis/drive_api_service.h
+++ b/chrome/browser/google_apis/drive_api_service.h
@@ -111,6 +111,12 @@ class DriveAPIService : public DriveServiceInterface,
   virtual void ResumeUpload(
       const ResumeUploadParams& params,
       const ResumeUploadCallback& callback) OVERRIDE;
+  virtual void GetUploadState(
+      const UploadMode upload_mode,
+      const FilePath& drive_file_path,
+      const GURL& upload_url,
+      int64 content_length,
+      const ResumeUploadCallback& callback) OVERRIDE;
   virtual void AuthorizeApp(
       const GURL& edit_url,
       const std::string& app_id,