cc: Apply occlusion before creating quads in RenderSurfaceImpl.

cc/test/mock_quad_culler.cc

Index: cc/test/mock_quad_culler.cc
diff --git a/cc/test/mock_quad_culler.cc b/cc/test/mock_quad_culler.cc
index d15f126aed5fc79b51fb756e21259abe58bb8378..54d631c54983849f553f46b86e5d4452b523fbbb 100644
--- a/cc/test/mock_quad_culler.cc
+++ b/cc/test/mock_quad_culler.cc
@@ -30,11 +30,22 @@ SharedQuadState* MockQuadCuller::UseSharedQuadState(
 gfx::Rect MockQuadCuller::UnoccludedContentRect(
     const gfx::Rect& content_rect,
     const gfx::Transform& draw_transform) {
+  DCHECK(draw_transform.IsIdentity() || occluded_content_rect_.IsEmpty());
   gfx::Rect result = content_rect;
   result.Subtract(occluded_content_rect_);
   return result;
 }
 
+gfx::Rect MockQuadCuller::UnoccludedContributingSurfaceContentRect(
+    const gfx::Rect& content_rect,
+    const gfx::Transform& draw_transform) {
+  DCHECK(draw_transform.IsIdentity() ||
+         occluded_content_rect_for_contributing_surface_.IsEmpty());
+  gfx::Rect result = content_rect;
+  result.Subtract(occluded_content_rect_for_contributing_surface_);
+  return result;
+}
+
 bool MockQuadCuller::MaybeAppend(scoped_ptr<DrawQuad> draw_quad) {
   if (!draw_quad->rect.IsEmpty()) {
     active_quad_list_->push_back(draw_quad.Pass());