Update from https://crrev.com/307664

cc/resources/pixel_buffer_raster_worker_pool.h

-// Copyright 2013 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_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_
-#define CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_
-
-#include <deque>
-#include <vector>
-
-#include "base/memory/weak_ptr.h"
-#include "base/values.h"
-#include "cc/base/delayed_unique_notifier.h"
-#include "cc/output/context_provider.h"
-#include "cc/resources/raster_worker_pool.h"
-#include "cc/resources/rasterizer.h"
-
-namespace base {
-namespace debug {
-class ConvertableToTraceFormat;
-class TracedValue;
-}
-}
-
-namespace cc {
-class ResourceProvider;
-
-class CC_EXPORT PixelBufferRasterWorkerPool : public RasterWorkerPool,
-                                              public Rasterizer,
-                                              public RasterizerTaskClient {
- public:
-  ~PixelBufferRasterWorkerPool() override;
-
-  static scoped_ptr<RasterWorkerPool> Create(
-      base::SequencedTaskRunner* task_runner,
-      TaskGraphRunner* task_graph_runner,
-      ContextProvider* context_provider,
-      ResourceProvider* resource_provider,
-      size_t max_transfer_buffer_usage_bytes);
-
-  // Overridden from RasterWorkerPool:
-  Rasterizer* AsRasterizer() override;
-
-  // Overridden from Rasterizer:
-  void SetClient(RasterizerClient* client) override;
-  void Shutdown() override;
-  void ScheduleTasks(RasterTaskQueue* queue) override;
-  void CheckForCompletedTasks() override;
-
-  // Overridden from RasterizerTaskClient:
-  scoped_ptr<RasterBuffer> AcquireBufferForRaster(
-      const Resource* resource) override;
-  void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) override;
-
- private:
-  struct RasterTaskState {
-    class TaskComparator {
-     public:
-      explicit TaskComparator(const RasterTask* task) : task_(task) {}
-
-      bool operator()(const RasterTaskState& state) const {
-        return state.task == task_;
-      }
-
-     private:
-      const RasterTask* task_;
-    };
-
-    typedef std::vector<RasterTaskState> Vector;
-
-    RasterTaskState(RasterTask* task, const TaskSetCollection& task_sets);
-
-    enum { UNSCHEDULED, SCHEDULED, UPLOADING, COMPLETED } type;
-    RasterTask* task;
-    TaskSetCollection task_sets;
-  };
-
-  typedef std::deque<scoped_refptr<RasterTask>> RasterTaskDeque;
-
-  PixelBufferRasterWorkerPool(base::SequencedTaskRunner* task_runner,
-                              TaskGraphRunner* task_graph_runner,
-                              ContextProvider* context_provider,
-                              ResourceProvider* resource_provider,
-                              size_t max_transfer_buffer_usage_bytes);
-
-  void OnRasterFinished(TaskSet task_set);
-  void FlushUploads();
-  void CheckForCompletedUploads();
-  void CheckForCompletedRasterTasks();
-  void ScheduleMoreTasks();
-  unsigned PendingRasterTaskCount() const;
-  TaskSetCollection PendingTasks() const;
-  void CheckForCompletedRasterizerTasks();
-
-  const char* StateName() const;
-  scoped_refptr<base::debug::ConvertableToTraceFormat> StateAsValue() const;
-  void ThrottleStateAsValueInto(base::debug::TracedValue* throttle_state) const;
-
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
-  TaskGraphRunner* task_graph_runner_;
-  const NamespaceToken namespace_token_;
-  RasterizerClient* client_;
-  ContextProvider* context_provider_;
-  ResourceProvider* resource_provider_;
-
-  bool shutdown_;
-
-  RasterTaskQueue raster_tasks_;
-  RasterTaskState::Vector raster_task_states_;
-  RasterTaskDeque raster_tasks_with_pending_upload_;
-  RasterTask::Vector completed_raster_tasks_;
-  RasterizerTask::Vector completed_image_decode_tasks_;
-
-  size_t scheduled_raster_task_count_;
-  size_t task_counts_[kNumberOfTaskSets];
-  size_t bytes_pending_upload_;
-  size_t max_bytes_pending_upload_;
-  bool has_performed_uploads_since_last_flush_;
-
-  TaskSetCollection should_notify_client_if_no_tasks_are_pending_;
-  TaskSetCollection raster_finished_tasks_pending_;
-
-  DelayedUniqueNotifier check_for_completed_raster_task_notifier_;
-
-  scoped_refptr<RasterizerTask> raster_finished_tasks_[kNumberOfTaskSets];
-
-  // Task graph used when scheduling tasks and vector used to gather
-  // completed tasks.
-  TaskGraph graph_;
-  Task::Vector completed_tasks_;
-
-  base::WeakPtrFactory<PixelBufferRasterWorkerPool>
-      raster_finished_weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(PixelBufferRasterWorkerPool);
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_