Reviewed by David Levin.

        This patch adds support for WOFF in Chromium. Since Chromium
        already transcodes all OpenType files for security reasons we
        are adding WOFF support into the transcoder.

        https://bugs.webkit.org/show_bug.cgi?id=38217

        * css/CSSFontFaceSrcValue.cpp:
        (WebCore::CSSFontFaceSrcValue::isSupportedFormat):
          Recognise "woff" as a font-face format value (guarded by
          ENABLE(OPENTYPE_SANITIZER) at this point)
        * platform/graphics/opentype/OpenTypeSanitizer.cpp:
        (WebCore::OpenTypeSanitizer::sanitize):
          Change so that the transcoded font can be larger than the original.
          (WOFF files are compressed, so the transcoded TTF is typically
          larger.)

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@58517 268f45cc-cd09-0410-ab3c-d52691b4dbfc