cc: Pass Occlusion instead of OcclusionTracker to LayerImpls

cc/layers/solid_color_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_SOLID_COLOR_LAYER_IMPL_H_
 #define CC_LAYERS_SOLID_COLOR_LAYER_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/layers/layer_impl.h"
 
 namespace cc {
 
 class CC_EXPORT SolidColorLayerImpl : public LayerImpl {
  public:
   static scoped_ptr<SolidColorLayerImpl> Create(LayerTreeImpl* tree_impl,
                                                 int id) {
     return make_scoped_ptr(new SolidColorLayerImpl(tree_impl, id));
   }
 
-  static void AppendSolidQuads(
-      RenderPass* render_pass,
-      const OcclusionTracker<LayerImpl>& occlusion_tracker,
-      SharedQuadState* shared_quad_state,
-      const gfx::Size& content_bounds,
-      const gfx::Transform& target_space_transform,
-      SkColor color,
-      AppendQuadsData* append_quads_data);
+  static void AppendSolidQuads(RenderPass* render_pass,
+                               const Occlusion& occlusion_in_content_space,
+                               SharedQuadState* shared_quad_state,
+                               const gfx::Size& content_bounds,
+                               SkColor color,
+                               AppendQuadsData* append_quads_data);
 
   virtual ~SolidColorLayerImpl();
 
   // LayerImpl overrides.
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
       override;
   virtual void AppendQuads(RenderPass* render_pass,
-                           const OcclusionTracker<LayerImpl>& occlusion_tracker,
+                           const Occlusion& occlusion_in_content_space,
                            AppendQuadsData* append_quads_data) override;
 
  protected:
   SolidColorLayerImpl(LayerTreeImpl* tree_impl, int id);
 
  private:
   virtual const char* LayerTypeAsString() const override;
 
   DISALLOW_COPY_AND_ASSIGN(SolidColorLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_SOLID_COLOR_LAYER_IMPL_H_