Fix by Mitz Pettel, reviewed by Maciej.

    Fix by Mitz Pettel, reviewed by Maciej.

        - fix http://bugzilla.opendarwin.org/show_bug.cgi?id=5923
          REGRESSION: scrolling on Google maps continues after the mouse is
          released outside the window

        Test: fast/events/drag-outside-window.html

        * rendering/render_layer.cpp:
        (WebCore::RenderLayer::containsPoint): Always return true for the root
        object to ensure that mouse events occurring outside the window target
        the document.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@13265 268f45cc-cd09-0410-ab3c-d52691b4dbfc