Re-land: cc: Add raster finished signals to RasterWorkerPool.

cc/resources/raster_worker_pool.h

Index: cc/resources/raster_worker_pool.h
diff --git a/cc/resources/raster_worker_pool.h b/cc/resources/raster_worker_pool.h
index 972cbdccb47e189175ac5f1a36604ecb9a2dd18a..4baa83552fede3e652e7219f740f0b0fa3f7cd86 100644
--- a/cc/resources/raster_worker_pool.h
+++ b/cc/resources/raster_worker_pool.h
@@ -105,6 +105,8 @@ struct RasterTaskMetadata {
 class CC_EXPORT RasterWorkerPoolClient {
  public:
   virtual bool ShouldForceTasksRequiredForActivationToComplete() const = 0;
+  virtual void DidFinishedRunningTasks() = 0;
+  virtual void DidFinishedRunningTasksRequiredForActivation() = 0;
 
  protected:
   virtual ~RasterWorkerPoolClient() {}
@@ -231,32 +233,14 @@ class CC_EXPORT RasterWorkerPool : public WorkerPool {
   typedef internal::RasterWorkerPoolTask* TaskMapKey;
   typedef base::hash_map<TaskMapKey,
                          scoped_refptr<internal::WorkerPoolTask> > TaskMap;
-
-  class CC_EXPORT RasterTaskGraph {
-   public:
-    RasterTaskGraph();
-    ~RasterTaskGraph();
-
-    void InsertRasterTask(internal::WorkerPoolTask* raster_task,
-                          const TaskVector& decode_tasks);
-
-   private:
-    friend class RasterWorkerPool;
-
-    TaskGraph graph_;
-    scoped_refptr<internal::WorkerPoolTask> raster_finished_task_;
-    scoped_ptr<GraphNode> raster_finished_node_;
-    unsigned next_priority_;
-
-    DISALLOW_COPY_AND_ASSIGN(RasterTaskGraph);
-  };
+  typedef std::vector<GraphNode*> NodeVector;
 
   RasterWorkerPool(ResourceProvider* resource_provider, size_t num_threads);
 
-  virtual void OnRasterTasksFinished() {}
+  virtual void OnRasterTasksFinished() = 0;
+  virtual void OnRasterTasksRequiredForActivationFinished() = 0;
 
   void SetRasterTasks(RasterTask::Queue* queue);
-  void SetRasterTaskGraph(RasterTaskGraph* graph);
   bool IsRasterTaskRequiredForActivation(
       internal::RasterWorkerPoolTask* task) const;
 
@@ -265,9 +249,36 @@ class CC_EXPORT RasterWorkerPool : public WorkerPool {
   const RasterTask::Queue::TaskVector& raster_tasks() const {
     return raster_tasks_;
   }
+  void set_raster_finished_task(
+      scoped_refptr<internal::WorkerPoolTask> raster_finished_task) {
+    raster_finished_task_ = raster_finished_task;
+  }
+  void set_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();
+
+  static GraphNode* CreateGraphNodeForTask(
+      internal::WorkerPoolTask* task,
+      unsigned priority,
+      TaskGraph* graph);
+
+  static GraphNode* CreateGraphNodeForRasterTask(
+      internal::WorkerPoolTask* raster_task,
+      const TaskVector& decode_tasks,
+      unsigned priority,
+      TaskGraph* graph);
 
  private:
-  void OnRasterFinished(int64 schedule_raster_tasks_count);
+  void OnRasterFinished(const internal::WorkerPoolTask* source);
+  void OnRasterRequiredForActivationFinished(
+      const internal::WorkerPoolTask* source);
 
   RasterWorkerPoolClient* client_;
   ResourceProvider* resource_provider_;
@@ -276,7 +287,8 @@ class CC_EXPORT RasterWorkerPool : public WorkerPool {
 
   base::WeakPtrFactory<RasterWorkerPool> weak_ptr_factory_;
   scoped_refptr<internal::WorkerPoolTask> raster_finished_task_;
-  int64 schedule_raster_tasks_count_;
+  scoped_refptr<internal::WorkerPoolTask>
+      raster_required_for_activation_finished_task_;
 };
 
 }  // namespace cc