cc: Apply occlusion before creating quads in RenderSurfaceImpl.

cc/trees/quad_culler.cc

Index: cc/trees/quad_culler.cc
diff --git a/cc/trees/quad_culler.cc b/cc/trees/quad_culler.cc
index f161f647f0a2d4a36cd50d2d10150996b6bba740..77ef2bdc7cb1a145013b9a98c4170d7d961e5b95 100644
--- a/cc/trees/quad_culler.cc
+++ b/cc/trees/quad_culler.cc
@@ -44,6 +44,13 @@ gfx::Rect QuadCuller::UnoccludedContentRect(
       layer_->render_target(), content_rect, draw_transform);
 }
 
+gfx::Rect QuadCuller::UnoccludedContributingSurfaceContentRect(
+    gfx::Rect& content_rect,
+    gfx::Transform& draw_transform) {
+  return occlusion_tracker_.UnoccludedContributingSurfaceContentRect(
+      layer_, content_rect, draw_transform);
+}
+
 static inline bool AppendQuadInternal(
     scoped_ptr<DrawQuad> draw_quad,
     const gfx::Rect& culled_rect,