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

third_party/WebKit/public/platform/scheduler/test/mock_renderer_scheduler.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_PUBLIC_PLATFORM_SCHEDULER_TEST_MOCK_RENDERER_SCHEDULER_H_
 #define THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_TEST_MOCK_RENDERER_SCHEDULER_H_
 
 #include "base/macros.h"
 #include "public/platform/scheduler/renderer/renderer_scheduler.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ skipping 40 matching lines @@
   MOCK_CONST_METHOD0(CanExceedIdleDeadlineIfRequired, bool());
   MOCK_METHOD0(ShouldYieldForHighPriorityWork, bool());
   MOCK_METHOD1(AddTaskObserver, void(base::MessageLoop::TaskObserver*));
   MOCK_METHOD1(RemoveTaskObserver, void(base::MessageLoop::TaskObserver*));
   MOCK_METHOD0(Shutdown, void());
   MOCK_METHOD0(SuspendTimerQueue, void());
   MOCK_METHOD0(ResumeTimerQueue, void());
   MOCK_METHOD1(SetTimerQueueSuspensionWhenBackgroundedEnabled, void(bool));
   MOCK_METHOD1(SetTopLevelBlameContext, void(base::trace_event::BlameContext*));
   MOCK_METHOD1(SetRAILModeObserver, void(RAILModeObserver*));
+  MOCK_METHOD0(MainThreadSeemsUnresponsive, bool());
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockRendererScheduler);
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_TEST_MOCK_RENDERER_SCHEDULER_H_