2009-05-13  Douglas R. Davidson  <ddavidso@apple.com>

        Reviewed by Darin Adler.

        <rdar://problem/6879145>
        Generate a contextual menu item allowing autocorrections to
        easily be changed back.  Refrain from re-correcting items
        that have already been autocorrected once.

        * dom/DocumentMarker.h:
        * editing/Editor.cpp:
        (WebCore::Editor::markAllMisspellingsAndBadGrammarInRanges):
        (WebCore::Editor::changeBackToReplacedString):
        * editing/Editor.h:
        * page/ContextMenuController.cpp:
        (WebCore::ContextMenuController::contextMenuItemSelected):
        * page/mac/WebCoreViewFactory.h:
        * platform/ContextMenu.cpp:
        (WebCore::ContextMenu::populate):
        (WebCore::ContextMenu::checkOrEnableIfNeeded):
        * platform/ContextMenuItem.h:
        * platform/LocalizedStrings.h:
        * platform/mac/LocalizedStringsMac.mm:
        (WebCore::contextMenuItemTagChangeBack):
        * rendering/HitTestResult...