cc: Clean up OcclusionTracker template parameters.

cc/test/fake_picture_layer.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_TEST_FAKE_PICTURE_LAYER_H_
 #define CC_TEST_FAKE_PICTURE_LAYER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/layers/picture_layer.h"
@@ skipping 13 matching lines @@
   void reset_update_count() { update_count_ = 0; }
 
   size_t push_properties_count() const { return push_properties_count_; }
   void reset_push_properties_count() { push_properties_count_ = 0; }
 
   void set_always_update_resources(bool always_update_resources) {
     always_update_resources_ = always_update_resources;
   }
 
   virtual bool Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion) OVERRIDE;
+                      const OcclusionTracker<Layer>* occlusion) OVERRIDE;
 
   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
 
  private:
   explicit FakePictureLayer(ContentLayerClient* client);
   virtual ~FakePictureLayer();
 
   size_t update_count_;
   size_t push_properties_count_;
   bool always_update_resources_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_PICTURE_LAYER_H_