Enforce constant size and device scale factor for surfaces

content/browser/frame_host/render_widget_host_view_child_frame.cc

Index: content/browser/frame_host/render_widget_host_view_child_frame.cc
diff --git a/content/browser/frame_host/render_widget_host_view_child_frame.cc b/content/browser/frame_host/render_widget_host_view_child_frame.cc
index 2b1a3292c4b6518e6fb4a241d6c1d3e969df708f..af48d26a584dbbf6e78f10a40a33dae9194314b5 100644
--- a/content/browser/frame_host/render_widget_host_view_child_frame.cc
+++ b/content/browser/frame_host/render_widget_host_view_child_frame.cc
@@ -368,7 +368,7 @@ void RenderWidgetHostViewChildFrame::ProcessCompositorFrame(
   current_surface_size_ = frame.render_pass_list.back()->output_rect.size();
   current_surface_scale_factor_ = frame.metadata.device_scale_factor;
 
-  support_->SubmitCompositorFrame(local_surface_id, std::move(frame));
+  DCHECK(support_->SubmitCompositorFrame(local_surface_id, std::move(frame)));

[danakj, 2017/05/19 19:00:59]

and here

[Saman Sami, 2017/05/19 19:26:46]

Done.

   has_frame_ = true;
 
   if (local_surface_id_ != local_surface_id || HasEmbedderChanged()) {