cc: Refactor TileTaskWorkerPool.

cc/raster/gpu_tile_task_worker_pool.h

Index: cc/raster/gpu_tile_task_worker_pool.h
diff --git a/cc/raster/gpu_tile_task_worker_pool.h b/cc/raster/gpu_tile_task_worker_pool.h
index a0a729189714f648fca3b6caf43722050cc58ef3..3fa683f1b1c6405a467714e65fbb4dc7d7a8eac2 100644
--- a/cc/raster/gpu_tile_task_worker_pool.h
+++ b/cc/raster/gpu_tile_task_worker_pool.h
@@ -21,17 +21,13 @@ class CC_EXPORT GpuTileTaskWorkerPool : public TileTaskWorkerPool,
   ~GpuTileTaskWorkerPool() override;
 
   static std::unique_ptr<TileTaskWorkerPool> Create(
-      base::SequencedTaskRunner* task_runner,
-      TaskGraphRunner* task_graph_runner,
       ContextProvider* context_provider,
       ResourceProvider* resource_provider,
       bool use_distance_field_text,
       int gpu_rasterization_msaa_sample_count);
 
   // 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;
@@ -44,22 +40,13 @@ class CC_EXPORT GpuTileTaskWorkerPool : public TileTaskWorkerPool,
   void ReleaseBufferForRaster(std::unique_ptr<RasterBuffer> buffer) override;
 
  private:
-  GpuTileTaskWorkerPool(base::SequencedTaskRunner* task_runner,
-                        TaskGraphRunner* task_graph_runner,
-                        ContextProvider* context_provider,
+  GpuTileTaskWorkerPool(ContextProvider* context_provider,
                         ResourceProvider* resource_provider,
                         bool use_distance_field_text,
                         int gpu_rasterization_msaa_sample_count);
 
-  void CompleteTasks(const Task::Vector& tasks);
-
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
-  TaskGraphRunner* task_graph_runner_;
-  const NamespaceToken namespace_token_;
   std::unique_ptr<GpuRasterizer> rasterizer_;
 
-  Task::Vector completed_tasks_;
-
   DISALLOW_COPY_AND_ASSIGN(GpuTileTaskWorkerPool);
 };