cc: Pass Occlusion instead of OcclusionTracker to LayerImpls

cc/layers/tiled_layer_impl.h

 // Copyright 2011 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_TILED_LAYER_IMPL_H_
 #define CC_LAYERS_TILED_LAYER_IMPL_H_
 
 #include <string>
 
 #include "cc/base/cc_export.h"
@@ skipping 11 matching lines @@
   }
   virtual ~TiledLayerImpl();
 
   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 ResourceProvider::ResourceId ContentsResourceId() const override;
 
   void set_skips_draw(bool skips_draw) { skips_draw_ = skips_draw; }
   void SetTilingData(const LayerTilingData& tiler);
   void PushTileProperties(int i,
                           int j,
                           ResourceProvider::ResourceId resource,
                           bool contents_swizzled);
@@ skipping 25 matching lines @@
   bool skips_draw_;
 
   scoped_ptr<LayerTilingData> tiler_;
 
   DISALLOW_COPY_AND_ASSIGN(TiledLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_TILED_LAYER_IMPL_H_