Unreviewed rebaselines for Chromium Mac and Windows.

        [chromium] fast/repaint/select-option-background-color.html fails on Windows and Mac
        https://bugs.webkit.org/show_bug.cgi?id=53260

        * platform/chromium-mac/fast/repaint/select-option-background-color-expected.checksum: Added.
        * platform/chromium-mac/fast/repaint/select-option-background-color-expected.png: Added.
        * platform/chromium-win/fast/repaint/select-option-background-color-expected.checksum: Added.
        * platform/chromium-win/fast/repaint/select-option-background-color-expected.png: Added.
        * platform/chromium-win/fast/repaint/select-option-background-color-expected.txt: Added.
        * platform/chromium/test_expectations.txt:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76868 268f45cc-cd09-0410-ab3c-d52691b4dbfc