support for pasteAndMatchStyle: command (see <rdar://problem/5723952>)

        * WebView/WebHTMLView.mm:
        (-[WebHTMLView _pasteWithPasteboard:allowPlainText:matchStyle:]):
        added matchStyle parameter, passed along to bridge (formerly always passed NO to bridge)
        (-[WebHTMLView readSelectionFromPasteboard:]):
        pass NO for new matchStyle parameter to match old behavior
        (-[WebHTMLView validateUserInterfaceItemWithoutDelegate:]):
        validate pasteAndMatchStyle the same way as pasteAsRichText
        (-[WebHTMLView pasteAndMatchStyle:]):
        just like pasteAsRichText but passes YES for matchStyle
        (-[WebHTMLView pasteAsRichText:]):
        pass NO for new matchStyle parameter to match old behavior
        (-[WebHTMLView paste:]):
        ditto
        
        * WebView/WebView.mm:
        added macro(pasteAndMatchStyle)
        
        * WebView/WebViewPrivate.h:
        added pasteAndMatchStyle: to WebViewEditingActionsPendingPublic category



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@30463 268f45cc-cd09-0410-ab3c-d52691b4dbfc