Use test_fonts for pdfium_embeddertests on all platforms

Bug: chromium:1250250
Change-Id: I63d07673d308ee9ede4689a44681accad1ab8aa8
R=thestig
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/87190
Auto-Submit: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/core/fxge/cfx_fontmapper.h b/core/fxge/cfx_fontmapper.h
index b62372e..956232e 100644
--- a/core/fxge/cfx_fontmapper.h
+++ b/core/fxge/cfx_fontmapper.h
@@ -58,6 +58,7 @@
   }
 
   void SetSystemFontInfo(std::unique_ptr<SystemFontInfoIface> pFontInfo);
+  std::unique_ptr<SystemFontInfoIface> TakeSystemFontInfo();
   void AddInstalledFont(const ByteString& name, FX_Charset charset);
   void LoadInstalledFonts();