cc: Remove ScheduleOnOriginThread() and CompleteOnOriginThread().

cc/tiles/tile_task_manager.cc

Index: cc/tiles/tile_task_manager.cc
diff --git a/cc/tiles/tile_task_manager.cc b/cc/tiles/tile_task_manager.cc
index 9f78d388eb4d22808abc89635e94cae88bb49883..7293aa99d7486d83923b3e51747f263c29c12283 100644
--- a/cc/tiles/tile_task_manager.cc
+++ b/cc/tiles/tile_task_manager.cc
@@ -28,44 +28,25 @@ TileTaskManagerImpl::TileTaskManagerImpl(
       task_graph_runner_(task_graph_runner),
       namespace_token_(task_graph_runner->GetNamespaceToken()) {}
 
-TileTaskManagerImpl::~TileTaskManagerImpl() {
-  DCHECK_EQ(0u, completed_tasks_.size());
-}
+TileTaskManagerImpl::~TileTaskManagerImpl() {}
 
 void TileTaskManagerImpl::ScheduleTasks(TaskGraph* graph) {
   TRACE_EVENT0("cc", "TileTaskManagerImpl::ScheduleTasks");
 
-  for (TaskGraph::Node::Vector::iterator it = graph->nodes.begin();
-       it != graph->nodes.end(); ++it) {
-    TaskGraph::Node& node = *it;
-    TileTask* task = static_cast<TileTask*>(node.task);
-
-    if (!task->HasBeenScheduled()) {
-      task->WillSchedule();
-      task->ScheduleOnOriginThread(raster_buffer_provider_.get());
-      task->DidSchedule();
-    }
-  }
-
   raster_buffer_provider_->OrderingBarrier();
-
   task_graph_runner_->ScheduleTasks(namespace_token_, graph);
 }
 
 void TileTaskManagerImpl::CheckForCompletedTasks() {
   TRACE_EVENT0("cc", "TileTaskManagerImpl::CheckForCompletedTasks");
+  Task::Vector completed_tasks;
+  task_graph_runner_->CollectCompletedTasks(namespace_token_, &completed_tasks);
 
-  task_graph_runner_->CollectCompletedTasks(namespace_token_,
-                                            &completed_tasks_);
-  for (Task::Vector::const_iterator it = completed_tasks_.begin();
-       it != completed_tasks_.end(); ++it) {
-    TileTask* task = static_cast<TileTask*>(it->get());
-
-    task->WillComplete();
-    task->CompleteOnOriginThread(raster_buffer_provider_.get());
-    task->DidComplete();
+  for (auto& task : completed_tasks) {
+    DCHECK(task->state().IsFinished() || task->state().IsCanceled());
+    TileTask* tile_task = static_cast<TileTask*>(task.get());
+    tile_task->OnTaskCompleted();
   }
-  completed_tasks_.clear();
 }
 
 void TileTaskManagerImpl::Shutdown() {