Remove parts of //cc we aren't using

cc/resources/tile_task_runner.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_RESOURCES_TILE_TASK_RUNNER_H_
-#define CC_RESOURCES_TILE_TASK_RUNNER_H_
-
-#include <bitset>
-#include <vector>
-
-#include "base/callback.h"
-#include "cc/resources/resource_format.h"
-#include "cc/resources/task_graph_runner.h"
-
-namespace cc {
-class ImageDecodeTask;
-class RasterTask;
-class Resource;
-class RasterBuffer;
-
-class CC_EXPORT TileTaskClient {
- public:
-  virtual scoped_ptr<RasterBuffer> AcquireBufferForRaster(
-      const Resource* resource) = 0;
-  virtual void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) = 0;
-
- protected:
-  virtual ~TileTaskClient() {}
-};
-
-class CC_EXPORT TileTask : public Task {
- public:
-  typedef std::vector<scoped_refptr<TileTask>> Vector;
-
-  virtual void ScheduleOnOriginThread(TileTaskClient* client) = 0;
-  virtual void CompleteOnOriginThread(TileTaskClient* client) = 0;
-  virtual void RunReplyOnOriginThread() = 0;
-
-  // Type-checking downcast routines.
-  virtual ImageDecodeTask* AsImageDecodeTask();
-  virtual RasterTask* AsRasterTask();
-
-  void WillSchedule();
-  void DidSchedule();
-  bool HasBeenScheduled() const;
-
-  void WillComplete();
-  void DidComplete();
-  bool HasCompleted() const;
-
- protected:
-  TileTask();
-  ~TileTask() override;
-
-  bool did_schedule_;
-  bool did_complete_;
-};
-
-class CC_EXPORT ImageDecodeTask : public TileTask {
- public:
-  typedef std::vector<scoped_refptr<ImageDecodeTask>> Vector;
-
-  // Overridden from TileTask:
-  ImageDecodeTask* AsImageDecodeTask() override;
-
- protected:
-  ImageDecodeTask();
-  ~ImageDecodeTask() override;
-};
-
-class CC_EXPORT RasterTask : public TileTask {
- public:
-  typedef std::vector<scoped_refptr<RasterTask>> Vector;
-
-  // Overridden from TileTask:
-  RasterTask* AsRasterTask() override;
-
-  const Resource* resource() const { return resource_; }
-  const ImageDecodeTask::Vector& dependencies() const { return dependencies_; }
-
- protected:
-  RasterTask(const Resource* resource, ImageDecodeTask::Vector* dependencies);
-  ~RasterTask() override;
-
- private:
-  const Resource* resource_;
-  ImageDecodeTask::Vector dependencies_;
-};
-
-// kNumberOfTaskSets must be greater or equal to the number of values in
-// TileManager::NamedTaskSet.
-// TODO(reveman): Use template specialization to make it easy for client code to
-// check at compile time that the number of supported task sets is correct.
-static const size_t kNumberOfTaskSets = 3;
-typedef size_t TaskSet;
-typedef std::bitset<kNumberOfTaskSets> TaskSetCollection;
-
-class CC_EXPORT TileTaskRunnerClient {
- public:
-  virtual void DidFinishRunningTileTasks(TaskSet task_set) = 0;
-  virtual TaskSetCollection TasksThatShouldBeForcedToComplete() const = 0;
-
- protected:
-  virtual ~TileTaskRunnerClient() {}
-};
-
-struct CC_EXPORT TileTaskQueue {
-  struct CC_EXPORT Item {
-    class TaskComparator {
-     public:
-      explicit TaskComparator(const RasterTask* task) : task_(task) {}
-
-      bool operator()(const Item& item) const { return item.task == task_; }
-
-     private:
-      const RasterTask* task_;
-    };
-
-    typedef std::vector<Item> Vector;
-
-    Item(RasterTask* task, const TaskSetCollection& task_sets);
-    ~Item();
-
-    RasterTask* task;
-    TaskSetCollection task_sets;
-  };
-
-  TileTaskQueue();
-  ~TileTaskQueue();
-
-  void Swap(TileTaskQueue* other);
-  void Reset();
-
-  Item::Vector items;
-};
-
-// This interface can be used to schedule and run tile tasks. The client will
-// be notified asynchronously when the set of tasks marked as "required for
-// activation" have finished running, when tasks marked "required for draw"
-// have finished running, and when all scheduled tasks have finished running.
-// The client can call CheckForCompletedTasks() at any time to dispatch
-// pending completion callbacks for all tasks that have finished running.
-class CC_EXPORT TileTaskRunner {
- public:
-  // Set the client instance to be notified when finished running tasks.
-  virtual void SetClient(TileTaskRunnerClient* client) = 0;
-
-  // Tells the worker pool to shutdown after canceling all previously scheduled
-  // tasks. Reply callbacks are still guaranteed to run when
-  // CheckForCompletedTasks() is called.
-  virtual void Shutdown() = 0;
-
-  // Schedule running of tile tasks in |queue| and all dependencies.
-  // Previously scheduled tasks that are not in |queue| will be canceled unless
-  // already running. Once scheduled, reply callbacks are guaranteed to run for
-  // all tasks even if they later get canceled by another call to
-  // ScheduleTasks().
-  virtual void ScheduleTasks(TileTaskQueue* queue) = 0;
-
-  // Check for completed tasks and dispatch reply callbacks.
-  virtual void CheckForCompletedTasks() = 0;
-
-  // Returns the format to use for the tiles.
-  virtual ResourceFormat GetResourceFormat() = 0;
-
- protected:
-  virtual ~TileTaskRunner() {}
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_TILE_TASK_RUNNER_H_