cc: Add mailbox support to ResourceProvider write locks.

cc/raster/one_copy_raster_buffer_provider.h

 // Copyright 2014 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_RASTER_ONE_COPY_RASTER_BUFFER_PROVIDER_H_
 #define CC_RASTER_ONE_COPY_RASTER_BUFFER_PROVIDER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "cc/output/context_provider.h"
 #include "cc/raster/raster_buffer_provider.h"
 #include "cc/resources/resource_provider.h"
+#include "gpu/command_buffer/common/sync_token.h"
 
 namespace cc {
 struct StagingBuffer;
 class StagingBufferPool;
 class ResourcePool;
 
 class CC_EXPORT OneCopyRasterBufferProvider : public RasterBufferProvider {
  public:
   ~OneCopyRasterBufferProvider() override;
 
   static std::unique_ptr<RasterBufferProvider> Create(
       base::SequencedTaskRunner* task_runner,
       ContextProvider* context_provider,
       ResourceProvider* resource_provider,
       int max_copy_texture_chromium_size,
       bool use_partial_raster,
       int max_staging_buffer_usage_in_bytes,
-      ResourceFormat preferred_tile_format);
+      ResourceFormat preferred_tile_format,
+      bool async_worker_context_enabled);
 
   // Overridden from RasterBufferProvider:
   std::unique_ptr<RasterBuffer> AcquireBufferForRaster(
       const Resource* resource,
       uint64_t resource_content_id,
       uint64_t previous_content_id) override;
   void ReleaseBufferForRaster(std::unique_ptr<RasterBuffer> buffer) override;
   void OrderingBarrier() override;
   ResourceFormat GetResourceFormat(bool must_support_alpha) const override;
   bool GetResourceRequiresSwizzle(bool must_support_alpha) const override;
@@ skipping 10 matching lines @@
       const RasterSource::PlaybackSettings& playback_settings,
       uint64_t previous_content_id,
       uint64_t new_content_id);
 
  protected:
   OneCopyRasterBufferProvider(base::SequencedTaskRunner* task_runner,
                               ResourceProvider* resource_provider,
                               int max_copy_texture_chromium_size,
                               bool use_partial_raster,
                               int max_staging_buffer_usage_in_bytes,
-                              ResourceFormat preferred_tile_format);
+                              ResourceFormat preferred_tile_format,
+                              bool async_worker_context_enabled);
 
  private:
   void PlaybackToStagingBuffer(
       StagingBuffer* staging_buffer,
       const Resource* resource,
       const RasterSource* raster_source,
       const gfx::Rect& raster_full_rect,
       const gfx::Rect& raster_dirty_rect,
       float scale,
       const RasterSource::PlaybackSettings& playback_settings,
       uint64_t previous_content_id,
       uint64_t new_content_id);
   void CopyOnWorkerThread(StagingBuffer* staging_buffer,
                           const Resource* resource,
                           ResourceProvider::ScopedWriteLockGL* resource_lock,
                           const RasterSource* raster_source,
                           uint64_t previous_content_id,
                           uint64_t new_content_id);
 
   ResourceProvider* const resource_provider_;
   const int max_bytes_per_copy_operation_;
   bool use_partial_raster_;
 
   // Context lock must be acquired when accessing this member.
   int bytes_scheduled_since_last_flush_;
 
   ResourceFormat preferred_tile_format_;
   std::unique_ptr<StagingBufferPool> staging_pool_;
 
+  bool async_worker_context_enabled_;
+  gpu::SyncToken sync_token_;
+
   DISALLOW_COPY_AND_ASSIGN(OneCopyRasterBufferProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RASTER_ONE_COPY_RASTER_BUFFER_PROVIDER_H_