Enforce constant size and device scale factor for surfaces

components/viz/frame_sinks/gpu_root_compositor_frame_sink.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/viz/frame_sinks/gpu_root_compositor_frame_sink.h"
 
 #include "cc/surfaces/compositor_frame_sink_support.h"
 #include "cc/surfaces/display.h"
 
 namespace viz {
@@ skipping 68 matching lines @@
   support_->EvictCurrentSurface();
 }
 
 void GpuRootCompositorFrameSink::SetNeedsBeginFrame(bool needs_begin_frame) {
   support_->SetNeedsBeginFrame(needs_begin_frame);
 }
 
 void GpuRootCompositorFrameSink::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]

same here, the name result isnt adding anything

+      support_->SubmitCompositorFrame(local_surface_id, std::move(frame));
+  if (!result) {
+    compositor_frame_sink_binding_.Close();
+    OnClientConnectionLost();
+  }
 }
 
 void GpuRootCompositorFrameSink::BeginFrameDidNotSwap(
     const cc::BeginFrameAck& begin_frame_ack) {
   support_->BeginFrameDidNotSwap(begin_frame_ack);
 }
 
 void GpuRootCompositorFrameSink::ClaimTemporaryReference(
     const cc::SurfaceId& surface_id) {
   support_->ClaimTemporaryReference(surface_id);
@@ skipping 44 matching lines @@
 }
 
 void GpuRootCompositorFrameSink::OnPrivateConnectionLost() {
   private_connection_lost_ = true;
   // Request destruction of |this| only if both connections are lost.
   delegate_->OnPrivateConnectionLost(support_->frame_sink_id(),
                                      client_connection_lost_);
 }
 
 }  // namespace viz