[DevTools] Added public method for async execution of scripts

Source/core/dom/ExecutionContext.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2012 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 163 matching lines @@
 }
 
 int ExecutionContext::circularSequentialID()
 {
     ++m_circularSequentialID;
     if (m_circularSequentialID <= 0)
         m_circularSequentialID = 1;
     return m_circularSequentialID;
 }
 
-int ExecutionContext::installNewTimeout(PassOwnPtr<ScheduledAction> action, int timeout, bool singleShot)
+int ExecutionContext::installNewTimeout(PassOwnPtr<ScheduledActionBase> action, int timeout, bool singleShot)

[vsevik, 2014/10/17 13:19:43]

I don't think it is fine that we generate timeoutId for extension executed
scripts.

 {
     int timeoutID;
     while (true) {
         timeoutID = circularSequentialID();
         if (!m_timeouts.contains(timeoutID))
             break;
     }
     TimeoutMap::AddResult result = m_timeouts.add(timeoutID, DOMTimer::create(this, action, timeout, singleShot, timeoutID));
     ASSERT(result.isNewEntry);
     DOMTimer* timer = result.storedValue->value.get();
@@ skipping 72 matching lines @@
 void ExecutionContext::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_pendingExceptions);
     HeapSupplementable<ExecutionContext>::trace(visitor);
 #endif
     LifecycleContext<ExecutionContext>::trace(visitor);
 }
 
 } // namespace blink