Allow WebExternalTextureLayers to receive a bitmap along with a mailbox

cc/trees/layer_tree_host.cc

 // 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.
 
 #include "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 
 #include "base/bind.h"
@@ skipping 34 matching lines @@
 
 RendererCapabilities::RendererCapabilities()
     : best_texture_format(0),
       using_partial_swap(false),
       using_set_visibility(false),
       using_egl_image(false),
       allow_partial_texture_updates(false),
       using_offscreen_context3d(false),
       max_texture_size(0),
       avoid_pow2_textures(false),
-      using_map_image(false) {}
+      using_map_image(false),
+      using_shared_memory_resources(false) {}
 
 RendererCapabilities::~RendererCapabilities() {}
 
 bool LayerTreeHost::AnyLayerTreeHostInstanceExists() {
   return s_num_layer_tree_instances > 0;
 }
 
 scoped_ptr<LayerTreeHost> LayerTreeHost::Create(
     LayerTreeHostClient* client,
     const LayerTreeSettings& settings,
@@ skipping 610 matching lines @@
     return;
 
   lcd_text_metrics_.total_num_cc_layers++;
   if (layer->draw_properties().can_use_lcd_text) {
     lcd_text_metrics_.total_num_cc_layers_can_use_lcd_text++;
     if (layer->contents_opaque())
       lcd_text_metrics_.total_num_cc_layers_will_use_lcd_text++;
   }
 }
 
+bool LayerTreeHost::UsingSharedMemoryResources() {
+  return GetRendererCapabilities().using_shared_memory_resources;
+}
+
 bool LayerTreeHost::UpdateLayers(Layer* root_layer,
                                  ResourceUpdateQueue* queue) {
   TRACE_EVENT1("cc", "LayerTreeHost::UpdateLayers",
                "commit_number", commit_number());
 
   LayerList update_list;
   {
     UpdateHudLayer();
 
     Layer* root_scroll = FindFirstScrollableLayer(root_layer);
@@ skipping 359 matching lines @@
     bool start_ready_animations = true;
     (*iter).second->UpdateState(start_ready_animations, NULL);
   }
 }
 
 skia::RefPtr<SkPicture> LayerTreeHost::CapturePicture() {
   return proxy_->CapturePicture();
 }
 
 }  // namespace cc