Add preliminary support for hw-accelerated tile rasterization.

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 40 matching lines @@
   int stride_;
   const Reply reply_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageWorkerPoolTaskImpl);
 };
 
 }  // namespace
 
 ImageRasterWorkerPool::ImageRasterWorkerPool(
     ResourceProvider* resource_provider,
+    ContextProvider* context_provider,
     size_t num_threads,
     GLenum texture_target)
-    : RasterWorkerPool(resource_provider, num_threads),
+    : RasterWorkerPool(resource_provider, context_provider, num_threads),
       texture_target_(texture_target),
       raster_tasks_pending_(false),
       raster_tasks_required_for_activation_pending_(false) {
 }
 
 ImageRasterWorkerPool::~ImageRasterWorkerPool() {
   DCHECK_EQ(0u, image_tasks_.size());
 }
 
 void ImageRasterWorkerPool::ScheduleTasks(RasterTask::Queue* queue) {

[reveman, 2013/12/17 00:28:48]

you're missing a call to CompleteOriginThreadTasks in this function.

[alokp, 2013/12/17 22:12:15]

Done.

   TRACE_EVENT0("cc", "ImageRasterWorkerPool::ScheduleTasks");
 
   RasterWorkerPool::SetRasterTasks(queue);
 
   if (!raster_tasks_pending_)
     TRACE_EVENT_ASYNC_BEGIN0("cc", "ScheduledTasks", this);
 
   raster_tasks_pending_ = true;
   raster_tasks_required_for_activation_pending_ = true;
 
@@ skipping 142 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