Extend components/test_runner's generated WebMediaStream to have a Chrome VideoTrack and Source

components/test_runner/test_runner.h

 // Copyright 2014 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 COMPONENTS_TEST_RUNNER_TEST_RUNNER_H_
 #define COMPONENTS_TEST_RUNNER_TEST_RUNNER_H_
 
 #include <deque>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "components/test_runner/test_runner_export.h"
 #include "components/test_runner/web_task.h"
 #include "components/test_runner/web_test_runner.h"
 #include "v8/include/v8.h"
 
 class GURL;
 class SkBitmap;
 
 namespace blink {
 class WebContentSettingsClient;
 class WebFrame;
+class WebMediaStream;
 class WebString;
 class WebView;
 class WebURLResponse;
 }
 
 namespace gin {
 class ArrayBufferView;
 class Arguments;
 }
 
@@ skipping 801 matching lines @@
   bool use_mock_theme_;
 
   base::WeakPtrFactory<TestRunner> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TestRunner);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_TEST_RUNNER_H_