wrapped around it. All current calls to WebCore::Frame from within the
  WebKitWebFrame are safe, even in the case where the WebCore::Frame is already
  detached from the WebCore::Page.
* For the mainFrame the WebKitWebView is holding the initial reference and
  will unref on destruction.
* For sub-frames the FramerLoaderClientGtk.cpp will do the unrefing when the
  frame gets detached from the parent.
* Make sure FrameLoader::detachFromParent gets called by calling FrameLoader::detachChildren


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@30226 268f45cc-cd09-0410-ab3c-d52691b4dbfc