Rubber-stamped by Dan Bernstein.

        Update some pixel results for composting tests; some were incorrect, and others had minor
        pixel differences.

        * platform/mac/compositing/color-matching/image-color-matching-expected.checksum:
        * platform/mac/compositing/color-matching/image-color-matching-expected.png:
        * platform/mac/compositing/direct-image-compositing-expected.checksum:
        * platform/mac/compositing/direct-image-compositing-expected.png:
        * platform/mac/compositing/overflow/overflow-scroll-expected.checksum:
        * platform/mac/compositing/overflow/overflow-scroll-expected.png:
        * platform/mac/compositing/reflections/animation-inside-reflection-expected.checksum:
        * platform/mac/compositing/reflections/animation-inside-reflection-expected.png:
        * platform/mac/compositing/reflections/load-video-in-reflection-expected.checksum:
        * platform/mac/compositing/reflections/load-video-in-reflection-expected.png:
        * platform/mac/compositing/reflections/nested-reflection-animated-expected.checksum:
        * platform/mac/compositing/reflections/nested-reflection-animated-expected.png:
        * platform/mac/compositing/reflections/nested-reflection-transition-expected.checksum:
        * platform/mac/compositing/reflections/nested-reflection-transition-expected.png:
        * platform/mac/compositing/reflections/reflection-on-composited-expected.checksum:
        * platform/mac/compositing/reflections/reflection-on-composited-expected.png:
        * platform/mac/compositing/repaint/become-overlay-composited-layer-expected.checksum: Added.
        * platform/mac/compositing/repaint/become-overlay-composited-layer-expected.png: Added.
        * platform/mac/compositing/repaint/layer-repaint-rects-expected.checksum:
        * platform/mac/compositing/repaint/layer-repaint-rects-expected.png:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@56013 268f45cc-cd09-0410-ab3c-d52691b4dbfc