Added the desktop shape fields to VideoPacket.

remoting/codec/video_decoder.h

Index: remoting/codec/video_decoder.h
diff --git a/remoting/codec/video_decoder.h b/remoting/codec/video_decoder.h
index f1eb650d10c7341ff2d5e4e5ac62a25201448e6f..d98e36faad4b626a849d402787e0dc6d8c66a1d4 100644
--- a/remoting/codec/video_decoder.h
+++ b/remoting/codec/video_decoder.h
@@ -68,6 +68,10 @@ class VideoDecoder {
                            uint8* image_buffer,
                            int image_stride,
                            SkRegion* output_region) = 0;
+
+  // Returns the "shape", if any, of the most recently rendered frame.
+  // The shape is returned in source dimensions.
+  virtual const SkRegion* GetImageShape() { return NULL; }

[Jamie, 2013/06/20 21:15:57]

Everything else here is pure virtual. Does this need a default implementation?
If it's convenient to leave it like this for now, can you add a TODO to make it
pure virtual once all subclasses inplemented it?

[Sergey Ulanov, 2013/06/20 21:27:21]

Can you use webrtc::DesktopRegion here instead of SkRegion? mainly for
consistency between client and host code. I'm planning to switch all client code
to using webrtc::DesktopRegion.

[alexeypa (please no reviews), 2013/06/20 22:05:11]

Done.

[alexeypa (please no reviews), 2013/06/20 22:05:11]

I will not be able to do it today. We would really like to submit it before the
branch point.

 };
 
 }  // namespace remoting