Remove redundant calls to FrameLoader::frameDetached().

Source/web/WebPagePopupImpl.cpp

 /*
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 220 matching lines @@
     m_popupClient->writeDocument(data.get());
     frame->loader().load(FrameLoadRequest(0, blankURL(), SubstituteData(data, "text/html", "UTF-8", KURL(), ForceSynchronousLoad)));
     return true;
 }
 
 void WebPagePopupImpl::destroyPage()
 {
     if (!m_page)
         return;
 
-    if (m_page->mainFrame())
-        toLocalFrame(m_page->mainFrame())->loader().frameDetached();
-
     m_page->willBeDestroyed();
     m_page.clear();
 }
 
 void WebPagePopupImpl::setRootGraphicsLayer(GraphicsLayer* layer)
 {
     m_rootGraphicsLayer = layer;
     m_rootLayer = layer ? layer->platformLayer() : 0;
 
     setIsAcceleratedCompositingActive(layer);
@@ skipping 149 matching lines @@
     // A WebPagePopupImpl instance usually has two references.
     //  - One owned by the instance itself. It represents the visible widget.
     //  - One owned by a WebViewImpl. It's released when the WebViewImpl ask the
     //    WebPagePopupImpl to close.
     // We need them because the closing operation is asynchronous and the widget
     // can be closed while the WebViewImpl is unaware of it.
     return adoptRef(new WebPagePopupImpl(client)).leakRef();
 }
 
 } // namespace blink