Add video frame recording capability to Chromoting hosts.

remoting/host/video_frame_recorder.h

 // 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.
 
 #ifndef REMOTING_HOST_VIDEO_FRAME_RECORDER_H_
 #define REMOTING_HOST_VIDEO_FRAME_RECORDER_H_
 
 #include <stdint.h>
 #include <list>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 
 namespace webrtc {
 class DesktopFrame;
 }
 
 namespace remoting {
 
 class VideoEncoder;
 
 // Allows sequences of DesktopFrames passed to a VideoEncoder to be recorded.
 //
-// VideoFrameRecorder is design to support applications which use a dedicated
+// VideoFrameRecorder is designed to support applications which use a dedicated
 // thread for video encoding, but need to manage that process from a "main"
 // or "control" thread.
 //
 // On the control thread:
 // 1. Create the VideoFrameRecorder on the controlling thread.
 // 2. Specify the amount of memory that may be used for recording.
 // 3. Call WrapVideoEncoder(), passing the actual VideoEncoder that will be
 //    used to encode frames.
 // 4. Hand the returned wrapper VideoEncoder of to the video encoding thread,
 //    to call in place of the actual VideoEncoder.
@@ skipping 54 matching lines @@
 
   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
   base::WeakPtrFactory<VideoFrameRecorder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoFrameRecorder);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_VIDEO_FRAME_RECORDER_H_