gpu: Refactor GpuMemoryBuffer framework for multi-process support.

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 <set>
 #include <vector>
@@ skipping 11 matching lines @@
     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 GLenum GetResourceFormat() const OVERRIDE;
   virtual void OnRasterTasksFinished() OVERRIDE;
   virtual void OnRasterTasksRequiredForActivationFinished() OVERRIDE;
 
  private:
   PixelBufferRasterWorkerPool(ResourceProvider* resource_provider,
                               size_t num_threads);
 
   void FlushUploads();
   void CheckForCompletedUploads();
   void ScheduleCheckForCompletedRasterTasks();
@@ skipping 31 matching lines @@
 
   bool should_notify_client_if_no_tasks_are_pending_;
   bool should_notify_client_if_no_tasks_required_for_activation_are_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(PixelBufferRasterWorkerPool);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_