Add Unicode Variation Selector support on Linux official builds

Source/platform/fonts/shaping/HarfBuzzFace.cpp

Index: Source/platform/fonts/shaping/HarfBuzzFace.cpp
diff --git a/Source/platform/fonts/shaping/HarfBuzzFace.cpp b/Source/platform/fonts/shaping/HarfBuzzFace.cpp
index 1fbc51207acad85afa595ce91d7302f4e7ab9b62..ef2aa6a18eda9ada689a4814f6794ec86b529987 100644
--- a/Source/platform/fonts/shaping/HarfBuzzFace.cpp
+++ b/Source/platform/fonts/shaping/HarfBuzzFace.cpp
@@ -162,9 +162,10 @@ static hb_bool_t harfBuzzGetGlyph(hb_font_t* hbFont, void* fontData, hb_codepoin
     HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(fontData);
 
     if (variationSelector) {
-#if OS(LINUX)
-        // TODO(kojii): Linux non-official builds cannot use new HB APIs
-        // until crbug.com/462689 resolved or pangoft2 updates its HB.
+#if OS(LINUX) && !defined(OFFICIAL_BUILD)
+        // TODO(kojii): Linux non-official builds cannot use hb_ot_font_set_funcs()
+        // until we find a way to bundle HB in non-official builds, or pangoft2
+        // updates its HB. See crbug.com/462689.
         return false;
 #else
         // Skia does not support variation selectors, but hb does.