Notify upload progress from batch request to its child requests.

google_apis/drive/base_requests.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.
 //
 // This file provides base classes used to issue HTTP requests for Google
 // APIs.
 
 #ifndef GOOGLE_APIS_DRIVE_BASE_REQUESTS_H_
 #define GOOGLE_APIS_DRIVE_BASE_REQUESTS_H_
 
@@ skipping 45 matching lines @@
 // Callback used to get the content from DownloadFileRequest.
 typedef base::Callback<void(
     DriveApiErrorCode error,
     scoped_ptr<std::string> content)> GetContentCallback;
 
 // Parses JSON passed in |json|. Returns NULL on failure.
 scoped_ptr<base::Value> ParseJson(const std::string& json);
 
 // Generate multipart body. If |predetermined_boundary| is not empty, it uses
 // the string as boundary. Otherwise it generates random boundary that does not
-// conflict with |parts|.
+// conflict with |parts|. If |data_offset| is not nullptr, it stores the
+// index of first byte of each part in multipart body.
 void GenerateMultipartBody(MultipartType multipart_type,
                            const std::string& predetermined_boundary,
                            const std::vector<ContentTypeAndData>& parts,
-                           ContentTypeAndData* output);
+                           ContentTypeAndData* output,
+                           std::vector<uint64>* data_offset);
 
 //======================= AuthenticatedRequestInterface ======================
 
 // An interface class for implementing a request which requires OAuth2
 // authentication.
 class AuthenticatedRequestInterface {
  public:
   // Called when re-authentication is required. See Start() for details.
   typedef base::Callback<void(AuthenticatedRequestInterface* request)>
       ReAuthenticateCallback;
@@ skipping 533 matching lines @@
   const ProgressCallback progress_callback_;
   const GURL download_url_;
   const base::FilePath output_file_path_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileRequestBase);
 };
 
 }  // namespace google_apis
 
 #endif  // GOOGLE_APIS_DRIVE_BASE_REQUESTS_H_