Implement aura::WindowPortMus::CreateCompositorFrameSink()

components/exo/surface.cc

Index: components/exo/surface.cc
diff --git a/components/exo/surface.cc b/components/exo/surface.cc
index 66784aebb22e03dc2573c159810fd03bab8fd187..5c52ad8e266624944ec1b330a9a86a68105bf4eb 100644
--- a/components/exo/surface.cc
+++ b/components/exo/surface.cc
@@ -772,6 +772,7 @@ void Surface::UpdateSurface(bool full_damage) {
   }
 
   content_size_ = layer_size;
+  window_->SetBounds(gfx::Rect(window_->bounds().origin(), content_size_));
   // TODO(jbauman): Figure out how this interacts with the pixel size of
   // CopyOutputRequests on the layer.
   gfx::Size contents_surface_size = layer_size;