cc: Pass Occlusion instead of OcclusionTracker to LayerImpls

cc/layers/video_layer_impl.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_LAYERS_VIDEO_LAYER_IMPL_H_
 #define CC_LAYERS_VIDEO_LAYER_IMPL_H_
 
 #include <vector>
 
 #include "cc/base/cc_export.h"
@@ skipping 18 matching lines @@
                                            media::VideoRotation video_rotation);
   virtual ~VideoLayerImpl();
 
   // LayerImpl implementation.
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
       override;
   virtual void PushPropertiesTo(LayerImpl* layer) override;
   virtual bool WillDraw(DrawMode draw_mode,
                         ResourceProvider* resource_provider) override;
   virtual void AppendQuads(RenderPass* render_pass,
-                           const OcclusionTracker<LayerImpl>& occlusion_tracker,
+                           const Occlusion& occlusion_in_content_space,
                            AppendQuadsData* append_quads_data) override;
   virtual void DidDraw(ResourceProvider* resource_provider) override;
   virtual void DidBecomeActive() override;
   virtual void ReleaseResources() override;
 
   void SetNeedsRedraw();
 
   void SetProviderClientImpl(
       scoped_refptr<VideoFrameProviderClientImpl> provider_client_impl);
 
@@ skipping 21 matching lines @@
   std::vector<unsigned> software_resources_;
   // Called once for each software resource.
   ReleaseCallbackImpl software_release_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_VIDEO_LAYER_IMPL_H_