Remove QuadCuller class and make QuadSink concrete

cc/test/mock_quad_culler.h

Index: cc/test/mock_quad_culler.h
diff --git a/cc/test/mock_quad_culler.h b/cc/test/mock_quad_culler.h
index 9ad07406f277de0fb50758b4345455e779446cd6..ca2f0aa3e52ccec88850f12697d2d92f6e56f8a9 100644
--- a/cc/test/mock_quad_culler.h
+++ b/cc/test/mock_quad_culler.h
@@ -18,21 +18,20 @@ class MockQuadCuller : public QuadSink {
  public:
   virtual ~MockQuadCuller();
 
-  MockQuadCuller(RenderPass* external_render_pass,
+  MockQuadCuller(RenderPass* render_pass,
                  MockOcclusionTracker<LayerImpl>* occlusion_tracker);
-  // QuadSink interface.
-  virtual SharedQuadState* CreateSharedQuadState() OVERRIDE;
-  virtual gfx::Rect UnoccludedContentRect(const gfx::Rect& content_rect,
-                                          const gfx::Transform& draw_transform)
-      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;
 
-  const QuadList& quad_list() const { return active_render_pass_->quad_list; }
+  const QuadList& quad_list() const { return render_pass_->quad_list; }
   const SharedQuadStateList& shared_quad_state_list() const {
-    return active_render_pass_->shared_quad_state_list;
+    return render_pass_->shared_quad_state_list;
   }
 
   void set_occluded_target_rect(const gfx::Rect& occluded) {
@@ -46,18 +45,12 @@ class MockQuadCuller : public QuadSink {
   }
 
   void clear_lists() {
-    active_render_pass_->quad_list.clear();
-    active_render_pass_->shared_quad_state_list.clear();
+    render_pass_->quad_list.clear();
+    render_pass_->shared_quad_state_list.clear();
   }
 
  private:
-  scoped_ptr<RenderPass> render_pass_storage_;
-  RenderPass* active_render_pass_;
-  scoped_ptr<MockOcclusionTracker<LayerImpl> > occlusion_tracker_storage_;
   MockOcclusionTracker<LayerImpl>* occlusion_tracker_;
-
-  gfx::Rect occluded_target_rect_;
-  gfx::Rect occluded_target_rect_for_contributing_surface_;
 };
 
 }  // namespace cc