Inject MessageLoop into Capturer

remoting/host/capturer.h

 // Copyright (c) 2010 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/lock.h"
 #include "base/task.h"
 #include "remoting/base/capture_data.h"
 #include "remoting/base/types.h"
 
+class MessageLoop;
+
 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:
 //
 // (1) InvalidateRects
 //     This is an optional step where regions of the screen are marked as
 //     invalid. Some platforms (Windows, for now) won't use this and will
@@ skipping 10 matching lines @@
 //     Mac version does not.
 //
 // Implementation has to ensure the following guarantees:
 // 1. Double buffering
 //    Since data can be read while another capture action is happening.
 class Capturer {
  public:
   // CaptureCompletedCallback is called when the capturer has completed.
   typedef Callback1<scoped_refptr<CaptureData> >::Type CaptureCompletedCallback;
 
-  Capturer();
+  Capturer(MessageLoop* message_loop);

[awong, 2010/11/16 00:42:12]

explicit

   virtual ~Capturer();
 
   // Called when the screen configuration is changed.
   virtual void ScreenConfigurationChanged() = 0;
 
   // Return the width of the screen.
   virtual int width() const;
 
   // Return the height of the screen.
   virtual int height() const;
@@ skipping 59 matching lines @@
   int width_;
   int height_;
 
   // Format of pixels returned in buffer.
   media::VideoFrame::Format pixel_format_;
   int bytes_per_row_;
 
   // The current buffer with valid data for reading.
   int current_buffer_;
 
+  // Message loop that operations should run on.
+  MessageLoop* message_loop_;
+
  private:
   // Rects that have been manually invalidated (through InvalidateRect).
   // These will be returned as dirty_rects in the capture data during the next
   // capture.
   InvalidRects inval_rects_;
 
   // A lock protecting |inval_rects_| across threads.
   Lock inval_rects_lock_;
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CAPTURER_H_