Bug 1441323 - Handle font variation settings in ScaledFontDWrite::GetWRFontInstanceOptions. r=lsalzman

gfx/2d/ScaledFontDWrite.cpp

@@ -502,6 +502,9 @@ ScaledFontDWrite::GetWRFontInstanceOptions(Maybe<wr::FontInstanceOptions>* aOutO
 
   *aOutOptions = Some(options);
   *aOutPlatformOptions = Some(platformOptions);
+
+  GetVariationsFromFontFace(mFontFace, aOutVariations);
+
   return true;
 }