gpu: Refactor GpuMemoryBuffer framework for multi-process support.

cc/resources/image_raster_worker_pool.cc

 // 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.
 
 #include "cc/resources/image_raster_worker_pool.h"
 
 #include "base/debug/trace_event.h"
 #include "base/values.h"
 #include "cc/debug/traced_value.h"
 #include "cc/resources/resource.h"
@@ skipping 138 matching lines @@
 
   set_raster_finished_task(new_raster_finished_task);
   set_raster_required_for_activation_finished_task(
       new_raster_required_for_activation_finished_task);
 
   TRACE_EVENT_ASYNC_STEP1(
       "cc", "ScheduledTasks", this, "rasterizing",
       "state", TracedValue::FromValue(StateAsValue().release()));
 }
 
+GLenum ImageRasterWorkerPool::GetResourceFormat() const {
+  return GL_RGBA;  // Only format supported by CHROMIUM_map_image
+}
+
 void ImageRasterWorkerPool::OnRasterTasksFinished() {
   DCHECK(raster_tasks_pending_);
   raster_tasks_pending_ = false;
   TRACE_EVENT_ASYNC_END0("cc", "ScheduledTasks", this);
   client()->DidFinishRunningTasks();
 }
 
 void ImageRasterWorkerPool::OnRasterTasksRequiredForActivationFinished() {
   DCHECK(raster_tasks_required_for_activation_pending_);
   raster_tasks_required_for_activation_pending_ = false;
@@ skipping 48 matching lines @@
   if (is_required_for_activation) {
     raster_required_for_activation_finished_node->add_dependency();
     image_node->add_dependent(raster_required_for_activation_finished_node);
   }
 
   raster_finished_node->add_dependency();
   image_node->add_dependent(raster_finished_node);
 }
 
 }  // namespace cc