iwyu: Use callback_old.h where appropriate, part 2.

remoting/host/capturer.h

 // Copyright (c) 2011 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_CAPTURER_H_
 #define REMOTING_HOST_CAPTURER_H_
 
 #include "base/basictypes.h"
-#include "base/callback.h"
+#include "base/callback_old.h"
 #include "remoting/base/capture_data.h"
 #include "remoting/base/types.h"
 
 namespace remoting {
 
 // A class to perform the task of capturing the image of a window.
 // The capture action is asynchronous to allow maximum throughput.
 //
 // The full capture process is as follows:
 //
@@ skipping 59 matching lines @@
   // method is called.
   virtual void CaptureInvalidRects(CaptureCompletedCallback* callback) = 0;
 
   // Get the size of the most recently captured screen.
   virtual const gfx::Size& size_most_recent() const = 0;
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CAPTURER_H_