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

third_party/WebKit/public/platform/scheduler/test/fake_renderer_scheduler.h

 // Copyright 2014 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_PUBLIC_PLATFORM_SCHEDULER_TEST_FAKE_RENDERER_SCHEDULER_H_
 #define THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_TEST_FAKE_RENDERER_SCHEDULER_H_
 
 #include "base/macros.h"
 #include "public/platform/scheduler/renderer/renderer_scheduler.h"
 
@@ skipping 38 matching lines @@
   void AddTaskObserver(base::MessageLoop::TaskObserver* task_observer) override;
   void RemoveTaskObserver(
       base::MessageLoop::TaskObserver* task_observer) override;
   void Shutdown() override;
   void SuspendTimerQueue() override;
   void ResumeTimerQueue() override;
   void SetTimerQueueSuspensionWhenBackgroundedEnabled(bool enabled) override;
   void SetTopLevelBlameContext(
       base::trace_event::BlameContext* blame_context) override;
   void SetRAILModeObserver(RAILModeObserver* observer) override;
+  bool ShouldForceEventsNonBlockingForUnresponsiveMainThread() const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FakeRendererScheduler);
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_TEST_FAKE_RENDERER_SCHEDULER_H_