Make nesting/running states a RunLoop rather than a MessageLoop concept.

third_party/WebKit/Source/platform/scheduler/base/test_task_time_observer.h

 // Copyright 2016 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.
 
 #ifndef THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TEST_TASK_TIME_OBSERVER_H_
 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TEST_TASK_TIME_OBSERVER_H_
 
 #include "base/time/time.h"
 #include "platform/scheduler/base/task_time_observer.h"
 
 namespace blink {
 namespace scheduler {
 
 class TestTaskTimeObserver : public TaskTimeObserver {
  public:
   void WillProcessTask(TaskQueue* task_queue, double start_time) override {}
   void DidProcessTask(TaskQueue* task_queue,
                       double start_time,
                       double end_time) override {}
-  void OnBeginNestedMessageLoop() override {}
+  void OnBeginNestedRunLoop() override {}
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TEST_TASK_TIME_OBSERVER_H_