cc: Remove RasterWorkerPool::Task.

cc/resources/image_raster_worker_pool.cc

Index: cc/resources/image_raster_worker_pool.cc
diff --git a/cc/resources/image_raster_worker_pool.cc b/cc/resources/image_raster_worker_pool.cc
index 4f35e8119983e7abf2f8c154b3380ace78e48f25..06327f960c962554c36103fa3d8cafd2a2cd671f 100644
--- a/cc/resources/image_raster_worker_pool.cc
+++ b/cc/resources/image_raster_worker_pool.cc
@@ -33,9 +33,15 @@ ImageRasterWorkerPool::ImageRasterWorkerPool(
 
 ImageRasterWorkerPool::~ImageRasterWorkerPool() {}
 
-void ImageRasterWorkerPool::ScheduleTasks(RasterTask::Queue* queue) {
+void ImageRasterWorkerPool::ScheduleTasks(RasterTaskQueue* queue) {
   TRACE_EVENT0("cc", "ImageRasterWorkerPool::ScheduleTasks");
 
+  DCHECK_EQ(queue->required_for_activation_count,
+            static_cast<size_t>(
+                std::count_if(queue->items.begin(),
+                              queue->items.end(),
+                              RasterTaskQueue::Item::IsRequiredForActivation)));
+
   if (!raster_tasks_pending_)
     TRACE_EVENT_ASYNC_BEGIN0("cc", "ScheduledTasks", this);
 
@@ -49,7 +55,7 @@ void ImageRasterWorkerPool::ScheduleTasks(RasterTask::Queue* queue) {
   scoped_refptr<internal::WorkerPoolTask>
       new_raster_required_for_activation_finished_task(
           CreateRasterRequiredForActivationFinishedTask(
-              queue->required_for_activation_count()));
+              queue->required_for_activation_count));
   scoped_refptr<internal::WorkerPoolTask> new_raster_finished_task(
       CreateRasterFinishedTask());
 
@@ -71,11 +77,11 @@ void ImageRasterWorkerPool::ScheduleTasks(RasterTask::Queue* queue) {
   InsertNodeForTask(&graph_,
                     new_raster_required_for_activation_finished_task.get(),
                     kRasterRequiredForActivationFinishedTaskPriority,
-                    queue->required_for_activation_count());
+                    queue->required_for_activation_count);
   InsertNodeForTask(&graph_,
                     new_raster_finished_task.get(),
                     kRasterFinishedTaskPriority,
-                    queue->count());
+                    queue->items.size());
 
   raster_tasks_.Swap(queue);