Remove QuadCuller class and make QuadSink concrete

cc/trees/quad_culler.h

-// 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.
-
-#ifndef CC_TREES_QUAD_CULLER_H_
-#define CC_TREES_QUAD_CULLER_H_
-
-#include "cc/base/cc_export.h"
-#include "cc/layers/quad_sink.h"
-
-namespace cc {
-class LayerImpl;
-class RenderPass;
-class RenderSurfaceImpl;
-template <typename LayerType>
-class OcclusionTracker;
-
-class CC_EXPORT QuadCuller : public QuadSink {
- public:
-  QuadCuller(RenderPass* render_pass,
-             const LayerImpl* layer,
-             const OcclusionTracker<LayerImpl>& occlusion_tracker);
-  virtual ~QuadCuller() {}
-
-  // QuadSink implementation.
-  virtual SharedQuadState* CreateSharedQuadState() OVERRIDE;
-  virtual gfx::Rect UnoccludedContentRect(const gfx::Rect& content_rect,
-                                          const gfx::Transform& draw_transform)
-      OVERRIDE;
-  virtual gfx::Rect UnoccludedContributingSurfaceContentRect(
-      const gfx::Rect& content_rect,
-      const gfx::Transform& draw_transform) OVERRIDE;
-  virtual void Append(scoped_ptr<DrawQuad> draw_quad) OVERRIDE;
-
- private:
-  RenderPass* render_pass_;
-  const LayerImpl* layer_;
-  const OcclusionTracker<LayerImpl>& occlusion_tracker_;
-
-  SharedQuadState* current_shared_quad_state_;
-
-  DISALLOW_COPY_AND_ASSIGN(QuadCuller);
-};
-
-}  // namespace cc
-
-#endif  // CC_TREES_QUAD_CULLER_H_