Extract testing utility TestGetContentCallback.

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 184 matching lines @@
   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));
 }
 
+TestGetContentCallback::TestGetContentCallback()
+    : ALLOW_THIS_IN_INITIALIZER_LIST(callback_(
+          base::Bind(&TestGetContentCallback::OnGetContent,
+                     base::Unretained(this)))) {
+}
+
+TestGetContentCallback::~TestGetContentCallback() {
+}
+
+std::string TestGetContentCallback::GetConcatenatedData() const {
+  std::string result;
+  for (size_t i = 0; i < data_.size(); ++i) {
+    result += *data_[i];
+  }
+  return result;
+}
+
+void TestGetContentCallback::OnGetContent(google_apis::GDataErrorCode error,
+                                          scoped_ptr<std::string> data) {
+  data_.push_back(data.release());
+}
+
 }  // namespace test_util
 }  // namespace google_apis