cc: Make occlusion a draw property.

cc/layers/layer_impl.cc

 // 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.
 
 #include "cc/layers/layer_impl.h"
 
 #include "base/json/json_reader.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
@@ skipping 360 matching lines @@
 }
 
 RenderPassId LayerImpl::FirstContributingRenderPassId() const {
   return RenderPassId(0, 0);
 }
 
 RenderPassId LayerImpl::NextContributingRenderPassId(RenderPassId id) const {
   return RenderPassId(0, 0);
 }
 
-bool LayerImpl::UpdateTiles(const Occlusion& occlusion_in_layer_space,
-                            bool resourceless_software_draw) {
-  return false;
-}
-
 void LayerImpl::GetContentsResourceId(ResourceProvider::ResourceId* resource_id,
                                       gfx::Size* resource_size) const {
   NOTREACHED();
   *resource_id = 0;
 }
 
 gfx::Vector2dF LayerImpl::ScrollBy(const gfx::Vector2dF& scroll) {
   RefreshFromScrollDelegate();
 
   gfx::ScrollOffset adjusted_scroll(scroll);
@@ skipping 1193 matching lines @@
   SetNeedsPushProperties();
   layer_tree_impl()->set_needs_update_draw_properties();
   if (should_have_render_surface) {
     render_surface_ = make_scoped_ptr(new RenderSurfaceImpl(this));
     return;
   }
   render_surface_.reset();
 }
 
 }  // namespace cc