Remove unused fields under components/test_runner

components/test_runner/mock_web_user_media_client.cc

 // 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.
 
 #include "components/test_runner/mock_web_user_media_client.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 109 matching lines @@
   void RunIfValid() override { request_.requestSucceeded(result_); }
 
  private:
   WebMediaStreamTrackSourcesRequest request_;
   WebVector<WebSourceInfo> result_;
 
   DISALLOW_COPY_AND_ASSIGN(SourcesRequestTask);
 };
 
 class MockExtraData : public WebMediaStream::ExtraData {
- public:
-  int foo;
 };
 
 MockWebUserMediaClient::MockWebUserMediaClient(WebTestDelegate* delegate)
     : delegate_(delegate) {}
 
 void MockWebUserMediaClient::requestUserMedia(
     const WebUserMediaRequest& stream_request) {
     DCHECK(!stream_request.isNull());
     WebUserMediaRequest request = stream_request;
 
@@ skipping 110 matching lines @@
   sources[i].initialize(WebString::fromUTF8(test_sources[i].id),
                         test_sources[i].kind,
                         WebString::fromUTF8(test_sources[i].label),
                         test_sources[i].facing);
   }
 
   delegate_->PostTask(new SourcesRequestTask(this, request, sources));
 }
 
 }  // namespace test_runner