WebTaskRunnerImpl to take a TaskQueue

components/scheduler/child/child_scheduler.h

Index: components/scheduler/child/child_scheduler.h
diff --git a/components/scheduler/child/child_scheduler.h b/components/scheduler/child/child_scheduler.h
index 87bcf56893bc8dbb50bb6895e1ebd597051f5d7f..113be648e08973e51b0dcaf0d4835ec56cd7ec56 100644
--- a/components/scheduler/child/child_scheduler.h
+++ b/components/scheduler/child/child_scheduler.h
@@ -16,13 +16,14 @@ class MessageLoop;
 }
 
 namespace scheduler {
+class TaskQueue;
 
 class SCHEDULER_EXPORT ChildScheduler {
  public:
   virtual ~ChildScheduler() {}
 
   // Returns the default task runner.
-  virtual scoped_refptr<base::SingleThreadTaskRunner> DefaultTaskRunner() = 0;
+  virtual scoped_refptr<TaskQueue> DefaultTaskRunner() = 0;
 
   // Returns the idle task runner. Tasks posted to this runner may be reordered
   // relative to other task types and may be starved for an arbitrarily long