Fixed EditActions for InsertHorizontalRule and RemoveFormat.
        
        * editing/JSEditor.cpp:
        * editing/ReplaceSelectionCommand.cpp:
        (WebCore::ReplaceSelectionCommand::ReplaceSelectionCommand):
        (WebCore::ReplaceSelectionCommand::editingAction):
        * editing/ReplaceSelectionCommand.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@15084 268f45cc-cd09-0410-ab3c-d52691b4dbfc