Add ProgressCallback to DriveServiceInterface::DownloadFile.

chrome/browser/google_apis/test_util.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_TEST_UTIL_H_
 #define CHROME_BROWSER_GOOGLE_APIS_TEST_UTIL_H_
 
 #include <string>
+#include <utility>
+#include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/template_util.h"
 #include "chrome/browser/google_apis/gdata_errorcode.h"
 
 class GURL;
 
 namespace base {
@@ skipping 239 matching lines @@
 base::Callback<void(typename internal::CopyResultCallbackHelper<T1>::InType,
                     typename internal::CopyResultCallbackHelper<T2>::InType,
                     typename internal::CopyResultCallbackHelper<T3>::InType,
                     typename internal::CopyResultCallbackHelper<T4>::InType)>
 CreateCopyResultCallback(T1* out1, T2* out2, T3* out3, T4* out4) {
   return base::Bind(
       &internal::CopyResultCallback<T1, T2, T3, T4>,
       internal::OutputParams<T1, T2, T3, T4>(out1, out2, out3, out4));
 }
 
+typedef std::pair<int64, int64> ProgressInfo;
+
+// Helper utility for recording the results via ProgressCallback.
+void AppendProgressCallbackResult(std::vector<ProgressInfo>* progress_values,
+                                  int64 progress,
+                                  int64 total);
+
 }  // namespace test_util
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_TEST_UTIL_H_