cc: Refactor TileTaskWorkerPool.

cc/raster/one_copy_tile_task_worker_pool.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_TILE_TASK_WORKER_POOL_H_
 #define CC_RASTER_ONE_COPY_TILE_TASK_WORKER_POOL_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "cc/output/context_provider.h"
 #include "cc/raster/tile_task_worker_pool.h"
 #include "cc/resources/resource_provider.h"
 
 namespace cc {
 struct StagingBuffer;
 class StagingBufferPool;
 class ResourcePool;
 
 class CC_EXPORT OneCopyTileTaskWorkerPool : public TileTaskWorkerPool,
                                             public RasterBufferProvider {
  public:
   ~OneCopyTileTaskWorkerPool() override;
 
   static std::unique_ptr<TileTaskWorkerPool> Create(
       base::SequencedTaskRunner* task_runner,
-      TaskGraphRunner* task_graph_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);
 
   // Overridden from TileTaskWorkerPool:
-  void Shutdown() override;
-  void ScheduleTasks(TaskGraph* graph) override;
-  void CheckForCompletedTasks() override;
+  void BarrierToSyncResources() override;
   ResourceFormat GetResourceFormat(bool must_support_alpha) const override;
   bool GetResourceRequiresSwizzle(bool must_support_alpha) const override;
   RasterBufferProvider* AsRasterBufferProvider() override;
 
   // 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;
 
   // Playback raster source and copy result into |resource|.
   void PlaybackAndCopyOnWorkerThread(
       const Resource* resource,
       ResourceProvider::ScopedWriteLockGL* resource_lock,
       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);
 
  protected:
   OneCopyTileTaskWorkerPool(base::SequencedTaskRunner* task_runner,
-                            TaskGraphRunner* task_graph_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);
 
  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);
 
-  TaskGraphRunner* task_graph_runner_;
-  const NamespaceToken namespace_token_;
   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_;
 
-  Task::Vector completed_tasks_;
-
   DISALLOW_COPY_AND_ASSIGN(OneCopyTileTaskWorkerPool);
 };
 
 }  // namespace cc
 
 #endif  // CC_RASTER_ONE_COPY_TILE_TASK_WORKER_POOL_H_