Reviewed by Xan Lopez.

        [Gtk] style="font-family: courier" makes text disappear
        https://bugs.webkit.org/show_bug.cgi?id=47452

        Added a GTK+ test for invalid fonts.

        * platform/gtk/fonts/font-with-no-valid-encoding-expected.checksum: Added.
        * platform/gtk/fonts/font-with-no-valid-encoding-expected.png: Added.
        * platform/gtk/fonts/font-with-no-valid-encoding-expected.txt: Added.
        * platform/gtk/fonts/font-with-no-valid-encoding.html: Added.
2010-12-10  Martin Robinson  <mrobinson@igalia.com>

        Reviewed by Xan Lopez.

        [Gtk] style="font-family: courier" makes text disappear
        https://bugs.webkit.org/show_bug.cgi?id=47452

        Don't ever use fonts that do not have any of the three charmaps that
        Fontconfig supports (Unicode, Apple Roman and Symbol). If we select
        a font that doesn't have one of these charmaps, use the next font in
        the list.

        Test: platform/gtk/fonts/font-with-no-valid-encoding.html

        * platform/graphics/freetype/FontCacheFreeType.cpp:
        (WebCore::FontCache::createFontPlatformData): Check whether the
        font we selected has a valid Fontconfig charmap.
        * platform/graphics/freetype/FontPlatformData.h: Added new method definition.
        * platform/graphics/freetype/FontPlatformDataFreeType.cpp:
        (WebCore::FontPlatformData::hasCompatibleCharmap): Added this method which
        verifies that a font has a valid Fontconfig charmap.
2010-12-10  Martin Robinson  <mrobinson@igalia.com>

        Reviewed by Xan Lopez.

        [Gtk] style="font-family: courier" makes text disappear
        https://bugs.webkit.org/show_bug.cgi?id=47452

        Add a test that verifies that fonts without valid charmaps are
        never selected.

        * DumpRenderTree/gtk/DumpRenderTree.cpp:
        (initializeFonts): Initialize DRT with our font (derived from Ahem)
        that has no valid charmap.
        * DumpRenderTree/gtk/fonts/FontWithNoValidEncoding.fon: Added.
        * DumpRenderTree/gtk/fonts/fonts.conf: Updated settings to override users'
        settings which may disable selection of bitmap fonts.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@73695 268f45cc-cd09-0410-ab3c-d52691b4dbfc