Reviewed by Darin

    Reviewed by Darin

        Initial plumbing for grammar checking. No actual grammar are checked at this time.

        * English.lproj/WebViewEditingContextMenu.nib/classes.nib:
        * English.lproj/WebViewEditingContextMenu.nib/info.nib:
        * English.lproj/WebViewEditingContextMenu.nib/objects.nib:
        Added grammar-checking item, reworded to match changes in framework. This will be used
        post-Tiger.

        * English.lproj/WebViewEditingContextMenuOld.nib/classes.nib: Added.
        * English.lproj/WebViewEditingContextMenuOld.nib/info.nib: Added.
        * English.lproj/WebViewEditingContextMenuOld.nib/objects.nib: Added.
        Copy of WebViewEditingContextMenu.nib, unchanged. This will be used on Tiger.

        * DefaultDelegates/WebDefaultContextMenuDelegate.m:
        (-[WebDefaultUIDelegate editingContextMenuItemsForElement:defaultMenuItems:]):
        Choose the right context menu based on BUILDING_ON_TIGER.

        * WebView/WebPreferenceKeysPrivate.h:
        declare grammar-related NSUserDefault value

        * WebView/WebViewPrivate.h:
        declare grammar-related methods

        * WebView/WebView.mm:
        declare static BOOL grammarCheckingEnabled
        (-[WebViewPrivate init]):
        initialize grammarCheckingEnabled to NSUserDefaults value
        (-[WebView validateUserInterfaceItem:]):
        validate toggleGrammarChecking: menu item
        (-[WebView isGrammarCheckingEnabled]):
        return value of grammarCheckingEnabled
        (-[WebView setGrammarCheckingEnabled:]):
        set value of grammarCheckingEnabled, call frame to remove existing bad grammar markers
        (-[WebView toggleGrammarChecking:]):
        flip the value

        * WebView/WebFrameInternal.h:
        * WebView/WebFrame.mm:
        (-[WebFrame _unmarkAllBadGrammar]):
        new placeholder method, does nothing yet

        * WebView/WebHTMLViewInternal.h:
        declare grammar-related methods

        * WebView/WebHTMLView.m:
        (-[NSArray validateUserInterfaceItem:]):
        validate toggleGrammarChecking: menu item
        (-[WebHTMLView isGrammarCheckingEnabled]):
        new method, calls through to WebView
        (-[WebHTMLView setGrammarCheckingEnabled:]):
        ditto
        (-[WebHTMLView toggleGrammarChecking:]):
        ditto

        * English.lproj/StringsNotToBeLocalized.txt:
        Updated for these changes

        * WebKit.xcodeproj/project.pbxproj:
        updated for new files

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@17255 268f45cc-cd09-0410-ab3c-d52691b4dbfc