Remove shaped desktop support from remoting host and client.

remoting/test/test_video_renderer.cc

Index: remoting/test/test_video_renderer.cc
diff --git a/remoting/test/test_video_renderer.cc b/remoting/test/test_video_renderer.cc
index 42bd96fb757217e35f54491264bde783f82ad7d8..00a4bf7f6d179c427f52bf6b323804ed44f1f554 100644
--- a/remoting/test/test_video_renderer.cc
+++ b/remoting/test/test_video_renderer.cc
@@ -177,9 +177,6 @@ void TestVideoRenderer::Core::ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
     }
   }
 
-  // To make life easier, assume that the desktop shape is a single rectangle.
-  packet->clear_use_desktop_shape();
-
   // Render the result into a new DesktopFrame instance that shares buffer with
   // |frame_|. updated_region() will be updated for |new_frame|, but not for
   // |frame_|.