collects the individual rects, making sure to only include RenderText.

        <rdar://problem/6810061>

        Reviewed by Sam Weinig.

        * bindings/objc/DOM.mm:
        (-[DOMNode textRects]): Added. Make a Range and call textRects.
        (-[DOMNode lineBoxRects]): Call textRects method.
        (-[DOMRange textRects]): Call Range::textRects.
        (-[DOMRange lineBoxRects]): Call textRects method.
        * bindings/objc/DOMPrivate.h: Add the new methods and a comment
        about lineBoxRects being deprecated.
        * dom/Range.cpp:
        (WebCore::Range::boundingBox): Call textRects (renamed from addLineBoxRects).
        (WebCore::Range::textRects): Renamed from addLineBoxRects. Iterate over the
        nodes instead of the RenderObjects to correctly account for offsets. Also
        only call absoluteRectsForRange on RenderText.
        * dom/Range.h: Renamed addLineBoxRects to textRects.
        * page/Frame.cpp:
        (WebCore::Frame::selectionTextRects): Call textRects (renamed from addLineBoxRects).
        * rendering/RenderObject.cpp:
        (WebCore::RenderObject::absoluteRectsForRange): Remove if conditions that made this
        function very specific for the lineBoxRects API. These functions are still used
        by the InspectorController, and this change improves what the Inspector shows.
        (WebCore::RenderObject::absoluteQuadsForRange): Ditto.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@42974 268f45cc-cd09-0410-ab3c-d52691b4dbfc