- added new VisibleRange class; not used yet

        * WebCore.pbproj/project.pbxproj: Added visible_range.h and visible_range.cpp.
        * khtml/editing/visible_range.cpp: Added.
        * khtml/editing/visible_range.h: Added.

        - tweaks

        * kwq/WebCoreBridge.mm: (-[WebCoreBridge alterCurrentSelection:direction:granularity:]):
        Use switch statement instead of if statement so we get a warning if we ever add a new
        granularity.

        * khtml/editing/selection.h: khtml, not DOM, namespace
        * khtml/editing/visible_position.h: Ditto.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@7654 268f45cc-cd09-0410-ab3c-d52691b4dbfc