Revert of cc: Remove WorkerPool class and instead use TaskGraphRunner directly.

cc/resources/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_RASTER_WORKER_POOL_H_
 #define CC_RESOURCES_RASTER_WORKER_POOL_H_
 
 #include <deque>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/resources/picture_pile_impl.h"
 #include "cc/resources/raster_mode.h"
-#include "cc/resources/resource_format.h"
-#include "cc/resources/task_graph_runner.h"
+#include "cc/resources/resource.h"
+#include "cc/resources/resource_provider.h"
 #include "cc/resources/tile_priority.h"
+#include "cc/resources/worker_pool.h"
+#include "third_party/khronos/GLES2/gl2.h"
 
 class SkPixelRef;
 
 namespace cc {
-
-class ContextProvider;
-class Resource;
-class ResourceProvider;
-
 namespace internal {
 
-class CC_EXPORT WorkerPoolTask : public Task {
- public:
-  virtual void CompleteOnOriginThread() = 0;
-
-  void WillComplete();
-  void DidComplete();
-  bool HasCompleted() const;
-
- protected:
-  WorkerPoolTask();
-  virtual ~WorkerPoolTask();
-
- private:
-  bool did_complete_;
-};
-
 class CC_EXPORT RasterWorkerPoolTask
     : public base::RefCounted<RasterWorkerPoolTask> {
  public:
+  typedef std::vector<scoped_refptr<WorkerPoolTask> > TaskVector;
+
   // Returns true if |buffer| was written to. False indicate that
   // the content of |buffer| is undefined and the resource doesn't
   // need to be initialized.
   virtual bool RunOnWorkerThread(unsigned thread_index,
                                  void* buffer,
                                  gfx::Size size,
                                  int stride) = 0;
   virtual void RunOnOriginThread(ResourceProvider* resource_provider,
                                  ContextProvider* context_provider) = 0;
   virtual void CompleteOnOriginThread() = 0;
 
   void DidRun(bool was_canceled);
   bool HasFinishedRunning() const;
   bool WasCanceled() const;
   void WillComplete();
   void DidComplete();
   bool HasCompleted() const;
 
   const Resource* resource() const { return resource_; }
-  const internal::Task::Vector& dependencies() const { return dependencies_; }
+  const TaskVector& dependencies() const { return dependencies_; }
   bool use_gpu_rasterization() const { return use_gpu_rasterization_; }
 
  protected:
   friend class base::RefCounted<RasterWorkerPoolTask>;
 
   RasterWorkerPoolTask(const Resource* resource,
-                       internal::Task::Vector* dependencies,
+                       TaskVector* dependencies,
                        bool use_gpu_rasterization);
   virtual ~RasterWorkerPoolTask();
 
  private:
   bool did_run_;
   bool did_complete_;
   bool was_canceled_;
   const Resource* resource_;
-  Task::Vector dependencies_;
+  TaskVector dependencies_;
   bool use_gpu_rasterization_;
 };
 
 }  // namespace internal
 }  // namespace cc
 
 #if defined(COMPILER_GCC)
 namespace BASE_HASH_NAMESPACE {
 template <> struct hash<cc::internal::RasterWorkerPoolTask*> {
   size_t operator()(cc::internal::RasterWorkerPoolTask* ptr) const {
     return hash<size_t>()(reinterpret_cast<size_t>(ptr));
   }
 };
 }  // namespace BASE_HASH_NAMESPACE
 #endif  // COMPILER
 
 namespace cc {
 
 class CC_EXPORT RasterWorkerPoolClient {
  public:
   virtual bool ShouldForceTasksRequiredForActivationToComplete() const = 0;
   virtual void DidFinishRunningTasks() = 0;
   virtual void DidFinishRunningTasksRequiredForActivation() = 0;
 
  protected:
   virtual ~RasterWorkerPoolClient() {}
 };
 
 // A worker thread pool that runs raster tasks.
-class CC_EXPORT RasterWorkerPool {
+class CC_EXPORT RasterWorkerPool : public WorkerPool {
  public:
   class CC_EXPORT Task {
    public:
     typedef base::Callback<void(bool was_canceled)> Reply;
 
     class CC_EXPORT Set {
      public:
       Set();
       ~Set();
 
       void Insert(const Task& task);
 
      private:
       friend class RasterWorkerPool;
       friend class RasterWorkerPoolTest;
 
-      internal::Task::Vector tasks_;
+      typedef internal::RasterWorkerPoolTask::TaskVector TaskVector;
+      TaskVector tasks_;
     };
 
     Task();
     ~Task();
 
     // Returns true if Task is null (doesn't refer to anything).
     bool is_null() const { return !internal_.get(); }
 
     // Returns the Task into an uninitialized state.
     void Reset();
@@ skipping 42 matching lines @@
     friend class RasterWorkerPool;
     friend class RasterWorkerPoolTest;
 
     explicit RasterTask(internal::RasterWorkerPoolTask* internal);
 
     scoped_refptr<internal::RasterWorkerPoolTask> internal_;
   };
 
   virtual ~RasterWorkerPool();
 
-  static void SetNumRasterThreads(int num_threads);
+  void SetClient(RasterWorkerPoolClient* client);
 
-  static int GetNumRasterThreads();
+  // Overidden from WorkerPool:
+  virtual void Shutdown() OVERRIDE;
+
+  // Schedule running of raster tasks in |queue| and all dependencies.
+  // Previously scheduled tasks that are no longer needed to run
+  // raster tasks 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(RasterTask::Queue* queue) = 0;
+
+  // Returns the target that needs to be used for raster task resources.
+  virtual GLenum GetResourceTarget() const = 0;
+
+  // Returns the format that needs to be used for raster task resources.
+  virtual ResourceFormat GetResourceFormat() const = 0;
+
+  // Force a check for completed raster tasks.
+  // Calls completion callbacks on completed tasks.
+  virtual void CheckForCompletedTasks();
 
   // TODO(vmpstr): Figure out an elegant way to not pass this many parameters.
   static RasterTask CreateRasterTask(
       const Resource* resource,
       PicturePileImpl* picture_pile,
       const gfx::Rect& content_rect,
       float contents_scale,
       RasterMode raster_mode,
       TileResolution tile_resolution,
       int layer_id,
       const void* tile_id,
       int source_frame_number,
       bool use_gpu_rasterization,
       RenderingStatsInstrumentation* rendering_stats,
       const RasterTask::Reply& reply,
       Task::Set* dependencies);
 
   static Task CreateImageDecodeTask(
       SkPixelRef* pixel_ref,
       int layer_id,
       RenderingStatsInstrumentation* stats_instrumentation,
       const Task::Reply& reply);
 
-  void SetClient(RasterWorkerPoolClient* client);
-
-  // Tells the worker pool to shutdown after canceling all previously
-  // scheduled tasks. Reply callbacks are still guaranteed to run.
-  virtual void Shutdown();
-
-  // Schedule running of raster tasks in |queue| and all dependencies.
-  // Previously scheduled tasks that are no longer needed to run
-  // raster tasks 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(RasterTask::Queue* queue) = 0;
-
-  // Force a check for completed tasks.
-  virtual void CheckForCompletedTasks();
-
-  // Returns the target that needs to be used for raster task resources.
-  virtual unsigned GetResourceTarget() const = 0;
-
-  // Returns the format that needs to be used for raster task resources.
-  virtual ResourceFormat GetResourceFormat() const = 0;
-
  protected:
-  typedef internal::TaskGraphRunner::TaskGraph TaskGraph;
   typedef std::vector<scoped_refptr<internal::WorkerPoolTask> > TaskVector;
   typedef std::vector<scoped_refptr<internal::RasterWorkerPoolTask> >
       RasterTaskVector;
   typedef std::deque<scoped_refptr<internal::RasterWorkerPoolTask> >
       RasterTaskDeque;
   typedef base::hash_set<internal::RasterWorkerPoolTask*> RasterTaskSet;
   typedef internal::RasterWorkerPoolTask* TaskMapKey;
-  typedef base::hash_map<TaskMapKey, scoped_refptr<internal::WorkerPoolTask> >
-      TaskMap;
+  typedef base::hash_map<TaskMapKey,
+                         scoped_refptr<internal::WorkerPoolTask> > TaskMap;
 
   RasterWorkerPool(ResourceProvider* resource_provider,
                    ContextProvider* context_provider);
 
   virtual void OnRasterTasksFinished() = 0;
   virtual void OnRasterTasksRequiredForActivationFinished() = 0;
 
-  void CheckForCompletedWorkerPoolTasks();
-  void SetTaskGraph(TaskGraph* graph);
-
   void SetRasterTasks(RasterTask::Queue* queue);
   bool IsRasterTaskRequiredForActivation(
       internal::RasterWorkerPoolTask* task) const;
   // Run raster tasks that use GPU on current thread.
   void RunGpuRasterTasks(const RasterTaskVector& tasks);
 
   RasterWorkerPoolClient* client() const { return client_; }
   ResourceProvider* resource_provider() const { return resource_provider_; }
   ContextProvider* context_provider() const { return context_provider_; }
   const RasterTaskVector& raster_tasks() const { return raster_tasks_; }
   const RasterTaskSet& raster_tasks_required_for_activation() const {
     return raster_tasks_required_for_activation_;
   }
   void set_raster_finished_task(
-      internal::WorkerPoolTask* raster_finished_task) {
+      scoped_refptr<internal::WorkerPoolTask> raster_finished_task) {
     raster_finished_task_ = raster_finished_task;
   }
   void set_raster_required_for_activation_finished_task(
-      internal::WorkerPoolTask* raster_required_for_activation_finished_task) {
+      scoped_refptr<internal::WorkerPoolTask>
+          raster_required_for_activation_finished_task) {
     raster_required_for_activation_finished_task_ =
         raster_required_for_activation_finished_task;
   }
 
   scoped_refptr<internal::WorkerPoolTask> CreateRasterFinishedTask();
   scoped_refptr<internal::WorkerPoolTask>
       CreateRasterRequiredForActivationFinishedTask(
           size_t tasks_required_for_activation_count);
 
   scoped_ptr<base::Value> ScheduledStateAsValue() const;
 
   static internal::GraphNode* CreateGraphNodeForTask(
       internal::WorkerPoolTask* task,
       unsigned priority,
       TaskGraph* graph);
 
   static internal::GraphNode* CreateGraphNodeForRasterTask(
       internal::WorkerPoolTask* raster_task,
-      const internal::Task::Vector& decode_tasks,
+      const TaskVector& decode_tasks,
       unsigned priority,
       TaskGraph* graph);
 
  private:
   void OnRasterFinished(const internal::WorkerPoolTask* source);
   void OnRasterRequiredForActivationFinished(
       const internal::WorkerPoolTask* source);
 
-  internal::NamespaceToken namespace_token_;
   RasterWorkerPoolClient* client_;
   ResourceProvider* resource_provider_;
   ContextProvider* context_provider_;
   RasterTask::Queue::TaskVector raster_tasks_;
   RasterTask::Queue::TaskSet raster_tasks_required_for_activation_;
   RasterTaskDeque completed_gpu_raster_tasks_;
 
   scoped_refptr<internal::WorkerPoolTask> raster_finished_task_;
   scoped_refptr<internal::WorkerPoolTask>
       raster_required_for_activation_finished_task_;
   base::WeakPtrFactory<RasterWorkerPool> weak_ptr_factory_;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RASTER_WORKER_POOL_H_