Rubber-stamped by Dan Bernstein.

        Update compositing pixel results now that DRT dumps them correctly.

        * compositing/overflow/overflow-scroll.html:
        Fixed typo in this testcase.

        * platform/mac/compositing/overflow/ancestor-overflow-expected.checksum:
        * platform/mac/compositing/overflow/ancestor-overflow-expected.png:
        * platform/mac/compositing/overflow/overflow-positioning-expected.checksum:
        * platform/mac/compositing/overflow/overflow-positioning-expected.png:
        * platform/mac/compositing/overflow/overflow-scroll-expected.txt:
        * platform/mac/compositing/overflow/parent-overflow-expected.checksum:
        * platform/mac/compositing/overflow/parent-overflow-expected.png:
        * platform/mac/compositing/repaint/content-into-overflow-expected.checksum:
        * platform/mac/compositing/repaint/content-into-overflow-expected.png:
        * platform/mac/compositing/repaint/overflow-into-content-expected.checksum:
        * platform/mac/compositing/repaint/overflow-into-content-expected.png:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@45411 268f45cc-cd09-0410-ab3c-d52691b4dbfc