Add canExceedIdleDeadlineIfRequired function to Scheduler and use it in Oilpan

Source/platform/scheduler/Scheduler.cpp

 // 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.
 
 #include "config.h"
 #include "platform/scheduler/Scheduler.h"
 
 #include "public/platform/Platform.h"
 #include "public/platform/WebScheduler.h"
 #include "public/platform/WebTraceLocation.h"
@@ skipping 71 matching lines @@
         m_webScheduler->postLoadingTask(location, task);
 }
 
 bool Scheduler::shouldYieldForHighPriorityWork() const
 {
     if (m_webScheduler)
         return m_webScheduler->shouldYieldForHighPriorityWork();
     return false;
 }
 
+bool Scheduler::canExceedIdleDeadlineIfRequired() const
+{
+    if (m_webScheduler)
+        return m_webScheduler->canExceedIdleDeadlineIfRequired();
+    return false;
+}
+
 } // namespace blink