Remove ChromotingHostContext from DnsBlackholeChecker.

remoting/host/desktop_environment.h

 // 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.
 
 #ifndef REMOTING_HOST_DESKTOP_ENVIRONMENT_H_
 #define REMOTING_HOST_DESKTOP_ENVIRONMENT_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace remoting {
 
 class AudioCapturer;
-class ChromotingHostContext;
 class EventExecutor;
 class VideoFrameCapturer;
 
 namespace protocol {
 class ClipboardStub;
 }
 
 class DesktopEnvironment {
  public:
   DesktopEnvironment(scoped_ptr<AudioCapturer> audio_capturer,
@@ skipping 17 matching lines @@
 
   // Used to capture video to deliver to clients.
   scoped_ptr<VideoFrameCapturer> video_capturer_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopEnvironment);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_DESKTOP_ENVIRONMENT_H_