Reviewed by Chris Marrin.

        WebGL shows PNG Textures with indexed colors too dark
        https://bugs.webkit.org/show_bug.cgi?id=47477

        Added test case for upload of indexed PNG images to
        gl-teximage.html in the Khronos WebGL conformance tests.
        Synchronized this test with the Khronos repository.

        * fast/canvas/webgl/gl-teximage-expected.txt:
        * fast/canvas/webgl/gl-teximage.html:
        * fast/canvas/webgl/resources/red-indexed.png: Added.
2011-01-28  Kenneth Russell  <kbr@google.com>

        Reviewed by Chris Marrin.

        WebGL shows PNG Textures with indexed colors too dark
        https://bugs.webkit.org/show_bug.cgi?id=47477

        Properly handle indexed PNG images by re-rendering them as RGBA
        images before upload. Verified with this layout test and the test
        cases from bugs 47477 and 53269.

        * platform/graphics/cg/GraphicsContext3DCG.cpp:
        (WebCore::GraphicsContext3D::getImageData):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@77108 268f45cc-cd09-0410-ab3c-d52691b4dbfc