Force events to be non blocking if main thread is unresponsive.

third_party/WebKit/Source/platform/scheduler/base/test_task_time_tracker.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_TRACKER_H_
 #define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TEST_TASK_TIME_TRACKER_H_
 
 #include "base/time/time.h"
 #include "platform/scheduler/base/task_time_tracker.h"
 
 namespace blink {
 namespace scheduler {
 
 class TestTaskTimeTracker : public TaskTimeTracker {
  public:
+  void ReportTaskStartTime(base::TimeTicks startTime) override {}

[Sami, 2016/08/24 14:56:01]

nit: This feels weirdly asymmetric now that both methods take |startTime|. Maybe
we only pass it to the former?

[tdresser, 2016/08/24 17:22:50]

Done.

   void ReportTaskTime(base::TimeTicks startTime,
                       base::TimeTicks endTime) override {}
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_TEST_TASK_TIME_TRACKER_H_