gpu video: optimize HW video to SW canvas and implement it for WebRTC.

content/renderer/media/video_capture_impl.cc

Index: content/renderer/media/video_capture_impl.cc
diff --git a/content/renderer/media/video_capture_impl.cc b/content/renderer/media/video_capture_impl.cc
index 4b3860c4b8b256809ec8c2407265be2d2d6c21ea..7f395cd97e6f8ba8358a190ef4ff6c7345da66ca 100644
--- a/content/renderer/media/video_capture_impl.cc
+++ b/content/renderer/media/video_capture_impl.cc
@@ -259,8 +259,6 @@ void VideoCaptureImpl::OnBufferReceived(int buffer_id,
   }
 }
 
-static void NullReadPixelsCB(const SkBitmap& bitmap) { NOTIMPLEMENTED(); }
-
 void VideoCaptureImpl::OnMailboxBufferReceived(
     int buffer_id,
     const gpu::MailboxHolder& mailbox_holder,
@@ -283,8 +281,7 @@ void VideoCaptureImpl::OnMailboxBufferReceived(
           &VideoCaptureImpl::OnClientBufferFinished, weak_factory_.GetWeakPtr(),
           buffer_id, scoped_refptr<ClientBuffer>())),
       last_frame_format_.frame_size, gfx::Rect(last_frame_format_.frame_size),
-      last_frame_format_.frame_size, timestamp - first_frame_timestamp_,
-      base::Bind(&NullReadPixelsCB), false);
+      last_frame_format_.frame_size, timestamp - first_frame_timestamp_, false);
 
   for (ClientInfoMap::iterator it = clients_.begin(); it != clients_.end();
        ++it) {