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

cc/resources/worker_pool.h

Index: cc/resources/worker_pool.h
diff --git a/cc/resources/worker_pool.h b/cc/resources/worker_pool.h
index 57bc774c082b8d19307f30e4876f1cba54d0f4b8..01fb625240d669aba56647cf9bf48e018de9dc5f 100644
--- a/cc/resources/worker_pool.h
+++ b/cc/resources/worker_pool.h
@@ -47,6 +47,39 @@ class CC_EXPORT WorkerPoolTask
   bool did_complete_;
 };
 
+class CC_EXPORT GraphNode {
+ public:
+  typedef std::vector<GraphNode*> Vector;
+
+  GraphNode(internal::WorkerPoolTask* task, unsigned priority);
+  ~GraphNode();
+
+  WorkerPoolTask* task() { return task_; }
+
+  void add_dependent(GraphNode* dependent) {
+    DCHECK(dependent);
+    dependents_.push_back(dependent);
+  }
+  const Vector& dependents() const { return dependents_; }
+
+  unsigned priority() const { return priority_; }
+
+  unsigned num_dependencies() const { return num_dependencies_; }
+  void add_dependency() { ++num_dependencies_; }
+  void remove_dependency() {
+    DCHECK(num_dependencies_);
+    --num_dependencies_;
+  }
+
+ private:
+  WorkerPoolTask* task_;
+  Vector dependents_;
+  unsigned priority_;
+  unsigned num_dependencies_;
+
+  DISALLOW_COPY_AND_ASSIGN(GraphNode);
+};
+
 }  // namespace internal
 }  // namespace cc
 
@@ -76,49 +109,12 @@ class CC_EXPORT WorkerPool {
   virtual void CheckForCompletedTasks();
 
  protected:
-  class CC_EXPORT GraphNode {
-   public:
-    typedef std::vector<GraphNode*> Vector;
-
-    GraphNode();
-    ~GraphNode();
-
-    void set_task(internal::WorkerPoolTask* task) { task_ = task; }
-    internal::WorkerPoolTask* task() { return task_; }
-
-    void add_dependent(GraphNode* dependent) {
-      DCHECK(dependent);
-      dependents_.push_back(dependent);
-    }
-    const Vector& dependents() const {
-      return dependents_;
-    }
-
-    void set_priority(unsigned priority) { priority_ = priority; }
-    unsigned priority() const { return priority_; }
-
-    unsigned num_dependencies() const {
-      return num_dependencies_;
-    }
-    void add_dependency() { ++num_dependencies_; }
-    void remove_dependency() {
-      DCHECK(num_dependencies_);
-      --num_dependencies_;
-    }
-
-   private:
-    internal::WorkerPoolTask* task_;
-    Vector dependents_;
-    unsigned priority_;
-    unsigned num_dependencies_;
-
-    DISALLOW_COPY_AND_ASSIGN(GraphNode);
-  };
   // A task graph contains a unique set of tasks with edges between
   // dependencies pointing in the direction of the dependents. Each task
   // need to be assigned a unique priority and a run count that matches
   // the number of dependencies.
-  typedef ScopedPtrHashMap<internal::WorkerPoolTask*, GraphNode> GraphNodeMap;
+  typedef ScopedPtrHashMap<internal::WorkerPoolTask*, internal::GraphNode>
+      GraphNodeMap;
   typedef GraphNodeMap TaskGraph;
 
   WorkerPool(size_t num_threads, const std::string& thread_name_prefix);