TaskGraphRunner Group support

cc/raster/single_thread_task_graph_runner.cc

 // Copyright 2015 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/raster/single_thread_task_graph_runner.h"
 
 #include <string>
 
 #include "base/threading/simple_thread.h"
 #include "base/threading/thread_restrictions.h"
@@ skipping 39 matching lines @@
 }
 
 void SingleThreadTaskGraphRunner::ScheduleTasks(NamespaceToken token,
                                                 TaskGraph* graph) {
   TRACE_EVENT2("cc", "SingleThreadTaskGraphRunner::ScheduleTasks", "num_nodes",
                graph->nodes.size(), "num_edges", graph->edges.size());
 
   DCHECK(token.IsValid());
   DCHECK(!TaskGraphWorkQueue::DependencyMismatch(graph));
 
+  // SingleThreadTaskGraphRunner does not care about categories.
+  TaskGraphWorkQueue::UncategorizeTaskGraph(graph);
+
   {
     base::AutoLock lock(lock_);
 
     DCHECK(!shutdown_);
 
     work_queue_.ScheduleTasks(token, graph);
 
     // If there is more work available, wake up the worker thread.
     if (work_queue_.HasReadyToRunTasks())
       has_ready_to_run_tasks_cv_.Signal();
@@ skipping 55 matching lines @@
     RunTaskWithLockAcquired();
   }
 }
 
 void SingleThreadTaskGraphRunner::RunTaskWithLockAcquired() {
   TRACE_EVENT0("toplevel",
                "SingleThreadTaskGraphRunner::RunTaskWithLockAcquired");
 
   lock_.AssertAcquired();
 
-  auto prioritized_task = work_queue_.GetNextTaskToRun();
+  auto prioritized_task = work_queue_.GetNextTaskToRun(0u /* category */);
   Task* task = prioritized_task.task;
 
   // Call WillRun() before releasing |lock_| and running task.
   task->WillRun();
 
   {
     base::AutoUnlock unlock(lock_);
     task->RunOnWorkerThread();
   }
 
   // This will mark task as finished running.
   task->DidRun();
 
   work_queue_.CompleteTask(prioritized_task);
 
   // If namespace has finished running all tasks, wake up origin thread.
   if (work_queue_.HasFinishedRunningTasksInNamespace(
           prioritized_task.task_namespace))
     has_namespaces_with_finished_running_tasks_cv_.Signal();
 }
 
 }  // namespace cc