Add ProgressCallback to DriveServiceInterface::DownloadFile.

chrome/browser/google_apis/test_util.cc

 // 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.
 
 #include "chrome/browser/google_apis/test_util.h"
 
 #include "base/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/json/json_reader.h"
 #include "base/message_loop.h"
@@ skipping 178 matching lines @@
 
   parts.clear();
   base::SplitString(range, '-', &parts);
   if (parts.size() != 2U)
     return false;
 
   return (base::StringToInt64(parts[0], start_position) &&
           base::StringToInt64(parts[1], end_position));
 }
 
+void AppendProgressCallbackResult(std::vector<ProgressInfo>* progress_values,
+                                  int64 progress,
+                                  int64 total) {
+  progress_values->push_back(ProgressInfo(progress, total));
+}
+
 }  // namespace test_util
 }  // namespace google_apis