cc: Add new RasterWorkerPool interface.

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 "cc/resources/raster_worker_pool.h"
+
+namespace cc {
+
+class CC_EXPORT PixelBufferRasterWorkerPool : public RasterWorkerPool,
+                                              public WorkerPoolClient {
+ public:
+  virtual ~PixelBufferRasterWorkerPool();
+
+  static scoped_ptr<RasterWorkerPool> Create(
+      ResourceProvider* resource_provider, size_t num_threads) {
+    return make_scoped_ptr<RasterWorkerPool>(
+        new PixelBufferRasterWorkerPool(resource_provider, num_threads));
+  }
+
+  // Overridden from WorkerPool:
+  virtual void Shutdown() OVERRIDE;
+  virtual void CheckForCompletedTasks() OVERRIDE;
+
+  // Overridden from RasterWorkerPool:
+  virtual void ScheduleTasks(RasterTask::Queue* queue) OVERRIDE;
+  virtual bool ForceUploadToComplete(const RasterTask& raster_task) OVERRIDE;
+
+ private:
+  PixelBufferRasterWorkerPool(ResourceProvider* resource_provider,
+                              size_t num_threads);
+
+  // Overridden from WorkerPoolClient:
+  virtual void DidFinishDispatchingWorkerPoolCompletionCallbacks() OVERRIDE;
+
+  bool CanScheduleRasterTask(internal::RasterWorkerPoolTask* task);
+  void ScheduleMoreTasks();
+  void OnRasterTaskCompleted(
+      scoped_refptr<internal::RasterWorkerPoolTask> task,
+      bool was_canceled,
+      bool needs_upload);
+  void AbortPendingUploads();
+  void DidFinishRasterTask(internal::RasterWorkerPoolTask* task);
+
+  TaskMap pixel_buffer_tasks_;
+
+  typedef std::deque<scoped_refptr<internal::RasterWorkerPoolTask> > TaskDeque;
+  TaskDeque tasks_with_pending_upload_;
+
+  size_t bytes_pending_upload_;
+  bool has_performed_uploads_since_last_flush_;
+  bool did_dispatch_completion_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(PixelBufferRasterWorkerPool);
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_