Remove unused fields under components/test_runner

components/test_runner/mock_web_media_stream_center.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_MOCK_WEB_MEDIA_STREAM_CENTER_H_
 #define COMPONENTS_TEST_RUNNER_MOCK_WEB_MEDIA_STREAM_CENTER_H_
 
 #include "base/macros.h"
 #include "components/test_runner/web_task.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamCenter.h"
@@ skipping 27 matching lines @@
       const blink::WebMediaStreamTrack& track) override;
   void didCreateMediaStream(blink::WebMediaStream& stream) override;
   blink::WebAudioSourceProvider* createWebAudioSourceFromMediaStreamTrack(
       const blink::WebMediaStreamTrack& track) override;
 
   // Task related methods
   WebTaskList* mutable_task_list() { return &task_list_; }
 
  private:
   WebTaskList task_list_;
-  TestInterfaces* interfaces_;
 
   DISALLOW_COPY_AND_ASSIGN(MockWebMediaStreamCenter);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_MOCK_WEB_MEDIA_STREAM_CENTER_H_