WIP: Implement 5xx Error handling.

chrome/browser/google_apis/drive_service_interface.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_GOOGLE_APIS_DRIVE_SERVICE_INTERFACE_H_
 #define CHROME_BROWSER_GOOGLE_APIS_DRIVE_SERVICE_INTERFACE_H_
 
 #include <string>
 
 // TODO(kochi): Further split gdata_operations.h and include only necessary
@@ skipping 224 matching lines @@
   // Initiates uploading of a document/file.
   // |callback| must not be null.
   virtual void InitiateUpload(const InitiateUploadParams& params,
                               const InitiateUploadCallback& callback) = 0;
 
   // Resumes uploading of a document/file on the calling thread.
   // |callback| must not be null.
   virtual void ResumeUpload(const ResumeUploadParams& params,
                             const ResumeUploadCallback& callback) = 0;
 
+  // Returns the current uploading state from the server.
+  // |callback| must not be null.
+  virtual void GetUploadState(
+      const UploadMode upload_mode,
+      const FilePath& drive_file_path,
+      const GURL& upload_url,
+      int64 content_length,
+      const ResumeUploadCallback& callback) = 0;
+
   // Authorizes a Drive app with the id |app_id| to open the given file.
   // Upon completion, invokes |callback| with the link to open the file with
   // the provided app. |callback| must not be null.
   virtual void AuthorizeApp(const GURL& edit_url,
                             const std::string& app_id,
                             const AuthorizeAppCallback& callback) = 0;
 };
 
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_DRIVE_SERVICE_INTERFACE_H_