Remove shaped desktop support from remoting host and client.

remoting/codec/video_decoder_vpx.h

Index: remoting/codec/video_decoder_vpx.h
diff --git a/remoting/codec/video_decoder_vpx.h b/remoting/codec/video_decoder_vpx.h
index d0029881e2bf3a48b98a145b1045e6ddff2864bd..a386ca20a3e4fb22a700c296083ad744ab37597b 100644
--- a/remoting/codec/video_decoder_vpx.h
+++ b/remoting/codec/video_decoder_vpx.h
@@ -14,11 +14,6 @@
 typedef const struct vpx_codec_iface vpx_codec_iface_t;
 typedef struct vpx_image vpx_image_t;
 
-namespace webrtc {
-class DesktopRect;
-class DesktopRegion;
-}  // namespace webrtc
-
 namespace remoting {
 
 class VideoDecoderVpx : public VideoDecoder {
@@ -38,9 +33,6 @@ class VideoDecoderVpx : public VideoDecoder {
 
   ScopedVpxCodec codec_;
 
-  // The shape of the most-recent frame, if any.
-  scoped_ptr<webrtc::DesktopRegion> desktop_shape_;
-
   DISALLOW_COPY_AND_ASSIGN(VideoDecoderVpx);
 };