Fix two XFA JS calls that trigger fatal errors in v8::FromJust().

BUG=pdfium:1223

Change-Id: I38056756372cbb8ab593917517b784fe3ce0b811
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/51874
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/BUILD.gn b/BUILD.gn
index 6885fc2..f0accf1 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -349,6 +349,7 @@
 
   if (pdf_enable_xfa) {
     deps += [
+      "fpdfsdk/fpdfxfa:embeddertests",
       "xfa/fwl:embeddertests",
       "xfa/fxfa/parser:embeddertests",
     ]