Enforce constant size and device scale factor for surfaces

components/viz/frame_sinks/gpu_compositor_frame_sink.cc

Index: components/viz/frame_sinks/gpu_compositor_frame_sink.cc
diff --git a/components/viz/frame_sinks/gpu_compositor_frame_sink.cc b/components/viz/frame_sinks/gpu_compositor_frame_sink.cc
index 81acb033feac9d9e22793a384d1266586768d906..285357eb298b115fa8259f5ab7b0b0f207fd3d1f 100644
--- a/components/viz/frame_sinks/gpu_compositor_frame_sink.cc
+++ b/components/viz/frame_sinks/gpu_compositor_frame_sink.cc
@@ -47,7 +47,12 @@ void GpuCompositorFrameSink::SetNeedsBeginFrame(bool needs_begin_frame) {
 void GpuCompositorFrameSink::SubmitCompositorFrame(
     const cc::LocalSurfaceId& local_surface_id,
     cc::CompositorFrame frame) {
-  support_->SubmitCompositorFrame(local_surface_id, std::move(frame));
+  bool result =

[danakj, 2017/05/19 19:31:39]

it's okay to keep this without the bool var, I think I'd prefer that

+      support_->SubmitCompositorFrame(local_surface_id, std::move(frame));
+  if (!result) {
+    compositor_frame_sink_binding_.Close();
+    OnClientConnectionLost();
+  }
 }
 
 void GpuCompositorFrameSink::BeginFrameDidNotSwap(