Don't allow processing of a command buffer to overlap with a previous swap.

This may be causing some synchronization problems, so disable it for now to see if that fixes it.


BUG=135546
TEST=


Review URL: https://chromiumcodereview.appspot.com/10825066

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149038 0039d316-1c4b-4281-b951-d872f2087c98

content/common/gpu/image_transport_surface_win.cc

@@ -199,6 +199,10 @@ void PbufferImageTransportSurface::SendBuffersSwapped() {
 
   DCHECK(!is_swap_buffers_pending_);
   is_swap_buffers_pending_ = true;
+
+  // Pause all processing of this command buffer.
+  // http://code.google.com/p/chromium/issues/detail?id=135546
+  DeferDraws();
 }
 
 void PbufferImageTransportSurface::OnBufferPresented(uint32 sync_point) {