BrowserExtension cleanup.
        
        - Removed unnecessary #include of BrowserExtension in Frame.h, added
        #includes to compensate in other files.
        
        - Removed unused versions of createNewWindow.
        
        * bindings/js/kjs_window.cpp:
        * bridge/BrowserExtension.h:
        * bridge/mac/BrowserExtensionMac.h:
        * bridge/mac/BrowserExtensionMac.mm:
        (WebCore::BrowserExtensionMac::createNewWindow):
        * bridge/mac/WebCoreFrameBridge.mm:
        * html/HTMLFormElement.cpp:
        * loader/mac/LoaderFunctionsMac.mm:
        * page/Frame.h:
        * page/FramePrivate.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@17092 268f45cc-cd09-0410-ab3c-d52691b4dbfc