- preparations for making more code C++

        * WebKitPrefix.h: Fixed ifdef so that C++ files get all the precompiled stuff
        that non-C++ files get.

        * Misc/WebKitLogging.h:
        * Misc/WebKitSystemBits.h:
        * Misc/WebLocalizableStrings.h:
        * WebCoreSupport/WebSystemInterface.h:
        Added extern "C".

        * Misc/WebNSViewExtras.h:
        * WebView/WebDataSource.m: (addTypesFromClass):
        * WebView/WebFrameView.m: (addTypesFromClass):
        Eliminated use of the identifier "class".

        * WebView/WebView.m: (-[WebView _goToItem:withLoadType:]): Added a type cast.

        * Plugins/WebBaseNetscapePluginView.m: Added lots of type casts.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@17000 268f45cc-cd09-0410-ab3c-d52691b4dbfc