cc: Stop passing the occlusion explicitly to AppendQuads.

cc/layers/painted_scrollbar_layer_impl.h

 // Copyright 2013 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_PAINTED_SCROLLBAR_LAYER_IMPL_H_
 #define CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_
 
 #include "cc/base/cc_export.h"
 #include "cc/input/scrollbar.h"
 #include "cc/layers/scrollbar_layer_impl_base.h"
@@ skipping 12 matching lines @@
       ScrollbarOrientation orientation);
   ~PaintedScrollbarLayerImpl() override;
 
   // LayerImpl implementation.
   scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
   void PushPropertiesTo(LayerImpl* layer) override;
 
   bool WillDraw(DrawMode draw_mode,
                 ResourceProvider* resource_provider) override;
   void AppendQuads(RenderPass* render_pass,
-                   const Occlusion& occlusion_in_content_space,
                    AppendQuadsData* append_quads_data) override;
 
   void SetThumbThickness(int thumb_thickness);
   void SetThumbLength(int thumb_length);
   void SetTrackStart(int track_start);
   void SetTrackLength(int track_length);
 
   void set_track_ui_resource_id(UIResourceId uid) {
     track_ui_resource_id_ = uid;
   }
@@ skipping 31 matching lines @@
   int thumb_thickness_;
   int thumb_length_;
   int track_start_;
   int track_length_;
 
   DISALLOW_COPY_AND_ASSIGN(PaintedScrollbarLayerImpl);
 };
 
 }  // namespace cc
 #endif  // CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_