Oilpan: make DOMWindowProperty a GC mixin.

Source/modules/gamepad/NavigatorGamepad.cpp

 /*
  * Copyright (C) 2011, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 110 matching lines @@
     }
     return m_gamepads.get();
 }
 
 void NavigatorGamepad::trace(Visitor* visitor)
 {
     visitor->trace(m_gamepads);
     visitor->trace(m_webkitGamepads);
     visitor->trace(m_pendingEvents);
     WillBeHeapSupplement<Navigator>::trace(visitor);
+    DOMWindowProperty::trace(visitor);
 }
 
 void NavigatorGamepad::didUpdateData()
 {
     // We should stop listening once we detached.
     ASSERT(window());
 
     // We register to the dispatcher before sampling gamepads so we need to check if we actually have an event listener.
     if (!m_hasEventListener)
         return;
@@ skipping 32 matching lines @@
 NavigatorGamepad::NavigatorGamepad(LocalFrame* frame)
     : DOMWindowProperty(frame)
     , PlatformEventController(frame ? frame->page() : 0)
     , DOMWindowLifecycleObserver(frame ? frame->domWindow() : 0)
     , m_dispatchOneEventRunner(this, &NavigatorGamepad::dispatchOneEvent)
 {
 }
 
 NavigatorGamepad::~NavigatorGamepad()
 {
+#if ENABLE(OILPAN)
+    stopUpdating();

[haraken, 2014/09/10 02:49:36]

Why is this necessary only in oilpan?

[sof, 2014/09/10 05:49:40]

Can't rely on willDestroyGlobalObjectInFrame() having been called.

+#endif
 }
 
 const char* NavigatorGamepad::supplementName()
 {
     return "NavigatorGamepad";
 }
 
 void NavigatorGamepad::willDestroyGlobalObjectInFrame()
 {
     stopUpdating();
@@ skipping 91 matching lines @@
         if (connectedGamepadChanged || (!oldWasConnected && newIsConnected)) {
             m_pendingEvents.append(newGamepad);
         }
     }
 
     if (!m_pendingEvents.isEmpty())
         m_dispatchOneEventRunner.runAsync();
 }
 
 } // namespace blink