[Media Router] Add DialMediaSinkService and DeviceDescriptionService

chrome/browser/media/router/discovery/dial/mock_device_description_service.h

+// Copyright 2017 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_MEDIA_ROUTER_DISCOVERY_DIAL_MOCK_DEVICE_DESCRIPTION_SERVICE_H_
+#define CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DIAL_MOCK_DEVICE_DESCRIPTION_SERVICE_H_
+
+#include "base/test/mock_callback.h"
+#include "chrome/browser/media/router/discovery/dial/device_description_service.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media_router {
+
+class MockDeviceDescriptionService : public DeviceDescriptionService {

[mark a. foltz, 2017/04/25 21:06:26]

Is this only used in DialMediaSinkServiceUnittest?  Consider folding it into
that file.

[zhaobin, 2017/04/26 18:50:05]

Done.

+ public:
+  MockDeviceDescriptionService(DeviceDescriptionParseSuccessCallback success_cb,
+                               DeviceDescriptionParseErrorCallback error_cb);
+  ~MockDeviceDescriptionService() override;
+
+  MOCK_METHOD2(GetDeviceDescriptions,
+               void(const std::vector<DialDeviceData>& devices,
+                    net::URLRequestContextGetter* request_context));
+};
+
+}  // namespace media_router
+
+#endif  // CHROME_BROWSER_MEDIA_ROUTER_DISCOVERY_DIAL_MOCK_DEVICE_DESCRIPTION_SERVICE_H_