[Cast] Compute utilization metrics and add performance overlay.

media/cast/sender/video_encoder_impl.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 MEDIA_CAST_SENDER_VIDEO_ENCODER_IMPL_H_
 #define MEDIA_CAST_SENDER_VIDEO_ENCODER_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "media/cast/cast_config.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/sender/software_video_encoder.h"
 #include "media/cast/sender/video_encoder.h"
 
 namespace media {
 class VideoFrame;
 
 namespace cast {
 
 // This object is called external from the main cast thread and internally from
 // the video encoder thread.
 class VideoEncoderImpl : public VideoEncoder {
  public:
   struct CodecDynamicConfig {
     bool key_frame_requested;
     uint32 latest_frame_id_to_reference;
     int bit_rate;
   };
 
-  typedef base::Callback<void(scoped_ptr<EncodedFrame>)>
-      FrameEncodedCallback;
-
   // Returns true if VideoEncoderImpl can be used with the given |video_config|.
   static bool IsSupported(const VideoSenderConfig& video_config);
 
   VideoEncoderImpl(scoped_refptr<CastEnvironment> cast_environment,
                    const VideoSenderConfig& video_config,
                    const StatusChangeCallback& status_change_cb);
 
   ~VideoEncoderImpl() final;
 
   // VideoEncoder implementation.
@@ skipping 15 matching lines @@
   // video encoder thread and video encoder thread can out-live the main thread.
   scoped_ptr<SoftwareVideoEncoder> encoder_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoEncoderImpl);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_SENDER_VIDEO_ENCODER_IMPL_H_