Remove const LayerImpl* from QuadSink

cc/test/mock_quad_culler.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/test/mock_quad_culler.h"
 
 namespace cc {
 
 MockQuadCuller::MockQuadCuller(
     RenderPass* render_pass,
     MockOcclusionTracker<LayerImpl>* occlusion_tracker)
-    : QuadSink(render_pass, NULL, occlusion_tracker),
+    : QuadSink(render_pass, occlusion_tracker),
       occlusion_tracker_(occlusion_tracker) {
 }
 
 MockQuadCuller::~MockQuadCuller() {}
 
 gfx::Rect MockQuadCuller::UnoccludedContentRect(
+    const LayerImpl* layer,
     const gfx::Rect& content_rect,
     const gfx::Transform& draw_transform) {
   return occlusion_tracker_->UnoccludedContentRect(
-      layer_, content_rect, draw_transform);
+      layer, content_rect, draw_transform);
 }
 
 gfx::Rect MockQuadCuller::UnoccludedContributingSurfaceContentRect(
+    const LayerImpl* layer,
     const gfx::Rect& content_rect,
     const gfx::Transform& draw_transform) {
   return occlusion_tracker_->UnoccludedContributingSurfaceContentRect(
-      layer_, content_rect, draw_transform);
+      layer, content_rect, draw_transform);
 }
 
 }  // namespace cc