Change the component type of STENCIL_INDEX8 to UNSIGNED_NORMALIZED That way RenderbufferStorageMultisample accepts STENCIL_INDEX8 as an internal format for a multisampled buffer (samples > 0) as it isn't concerned by the restriction on integer component types anymore. This is consistent with the component type returned by the NVIDIA driver. BUG=angle:812 Change-Id: Ic03f502ffa082b1011e8127213a5c1df0617ef43 Reviewed-on: https://chromium-review.googlesource.com/227470 Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Tested-by: Shannon Woods <shannonwoods@chromium.org>