cc: Implement deadine scheduling disabled by default

ui/compositor/compositor.h

Index: ui/compositor/compositor.h
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index e6ce889f525520693bd9d838da61f1230e16fed2..5acc63cf0f0a18f638f5657a7da20cf783aa76a6 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -34,6 +34,7 @@ class ContextProvider;
 class Layer;
 class LayerTreeDebugState;
 class LayerTreeHost;
+class LayerTreeSettings;
 class TestContextProvider;
 }
 
@@ -303,6 +304,9 @@ class COMPOSITOR_EXPORT Compositor
   static scoped_refptr<base::MessageLoopProxy> GetCompositorMessageLoop();
   static void Terminate();
 
+  // Retrieves the current LayerTreeSettings
+  const cc::LayerTreeSettings& layer_tree_settings() const;
+
   // Schedules a redraw of the layer tree associated with this compositor.
   void ScheduleDraw();