Remove no longer needed BlinkTestRunner::proxy_ field.

content/shell/renderer/layout_test/blink_test_runner.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 "content/shell/renderer/layout_test/blink_test_runner.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <clocale>
@@ skipping 190 matching lines @@
 
  protected:
   ~MockAudioCapturerSource() override {}
 };
 
 }  // namespace
 
 BlinkTestRunner::BlinkTestRunner(RenderView* render_view)
     : RenderViewObserver(render_view),
       RenderViewObserverTracker<BlinkTestRunner>(render_view),
-      proxy_(NULL),
       is_main_window_(false),
       focus_on_next_commit_(false),
       leak_detector_(new LeakDetector(this)) {
 }
 
 BlinkTestRunner::~BlinkTestRunner() {
 }
 
 // WebTestDelegate  -----------------------------------------------------------
 
@@ skipping 738 matching lines @@
   get_bluetooth_events_callbacks_.pop_front();
   callback.Run(events);
 }
 
 void BlinkTestRunner::ReportLeakDetectionResult(
     const LeakDetectionResult& report) {
   Send(new ShellViewHostMsg_LeakDetectionDone(routing_id(), report));
 }
 
 }  // namespace content