[WIP] Migrate hasPendingActivity from ActiveDOMObject to ScriptWrappable.

third_party/WebKit/Source/core/dom/ActiveDOMObject.h

 /*
  * Copyright (C) 2008 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 26 matching lines @@
 public:
     ActiveDOMObject(ExecutionContext*);
 
     // suspendIfNeeded() should be called exactly once after object construction to synchronize
     // the suspend state with that in ExecutionContext.
     void suspendIfNeeded();
 #if ENABLE(ASSERT)
     bool suspendIfNeededCalled() const { return m_suspendIfNeededCalled; }
 #endif
 
-    // Should return true if there's any pending asynchronous activity, and so
-    // this object must not be garbage collected.
-    virtual bool hasPendingActivity() const;
-
     // These methods have an empty default implementation so that subclasses
     // which don't need special treatment can skip implementation.
     virtual void suspend();
     virtual void resume();
     virtual void stop();
 
     void didMoveToNewExecutionContext(ExecutionContext*);
 
 protected:
     virtual ~ActiveDOMObject();
 
 private:
 #if ENABLE(ASSERT)
     bool m_suspendIfNeededCalled;
 #endif
 };
 
 } // namespace blink
 
 #endif // ActiveDOMObject_h