void DOMWindowExtension::willDetachPage()
{
// willDetachPage might be called multiple times but we only want to react once.
if (m_wasDetached)
return;
// Calling out to the client might result in this DOMWindowExtension being destroyed
// while there is still work to do.
RefPtr<DOMWindowExtension> protector = this;
Frame* frame = m_disconnectedFrame.get();
if (!frame)
frame = this->frame();
ASSERT(frame);
// DOMWindowExtension lifetime isn't tied directly to the DOMWindow itself so it is important that it unregister
// itself from any DOMWindow it is associated with when detached.
// This might be the disconnected DOMWindow if the DOMWindow is in a CachedPage that is pruned.
DOMWindow* associatedDOMWindow = m_disconnectedDOMWindow ? m_disconnectedDOMWindow : frame->domWindow();
associatedDOMWindow->unregisterProperty(this);
m_disconnectedDOMWindow = 0;
frame->loader()->client()->dispatchWillDestroyGlobalObjectForDOMWindowExtension(this);
m_disconnectedFrame = 0;
DOMWindowProperty::willDetachPage();
m_wasDetached = true;
}
