cc: Add mailbox support to ResourceProvider write locks.

cc/trees/layer_tree_host_impl.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_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 2185 matching lines @@
   if (use_gpu_rasterization_) {
     DCHECK(resource_provider_->output_surface()->worker_context_provider());
 
     *resource_pool =
         ResourcePool::Create(resource_provider_.get(), GetTaskRunner());
 
     int msaa_sample_count = use_msaa_ ? RequestedMSAASampleCount() : 0;
 
     *raster_buffer_provider = GpuRasterBufferProvider::Create(
         context_provider, resource_provider_.get(),
-        settings_.use_distance_field_text, msaa_sample_count);
+        settings_.use_distance_field_text, msaa_sample_count,
+        settings_.async_worker_context_enabled);
     return;
   }
 
   DCHECK(GetRendererCapabilities().using_image);
 
   bool use_zero_copy = settings_.use_zero_copy;
   // TODO(reveman): Remove this when mojo supports worker contexts.
   // crbug.com/522440
   if (!resource_provider_->output_surface()->worker_context_provider()) {
     LOG(ERROR)
@@ skipping 14 matching lines @@
   *resource_pool =
       ResourcePool::Create(resource_provider_.get(), GetTaskRunner());
 
   const int max_copy_texture_chromium_size =
       context_provider->ContextCapabilities().max_copy_texture_chromium_size;
 
   *raster_buffer_provider = OneCopyRasterBufferProvider::Create(
       GetTaskRunner(), context_provider, resource_provider_.get(),
       max_copy_texture_chromium_size, settings_.use_partial_raster,
       settings_.max_staging_buffer_usage_in_bytes,
-      settings_.renderer_settings.preferred_tile_format);
+      settings_.renderer_settings.preferred_tile_format,
+      settings_.async_worker_context_enabled);
 }
 
 void LayerTreeHostImpl::SetLayerTreeMutator(LayerTreeMutator* mutator) {
   TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("compositor-worker"),
                "LayerTreeHostImpl::SetLayerTreeMutator");
   mutator_ = mutator;
 }
 
 void LayerTreeHostImpl::CleanUpTileManagerAndUIResources() {
   ClearUIResources();
@@ skipping 1703 matching lines @@
   return task_runner_provider_->HasImplThread();
 }
 
 bool LayerTreeHostImpl::CommitToActiveTree() const {
   // In single threaded mode we skip the pending tree and commit directly to the
   // active tree.
   return !task_runner_provider_->HasImplThread();
 }
 
 }  // namespace cc