Add XFA pdfium fuzzer

pdf/pdfium/fuzzers/pdfium_fuzzer.cc

Index: pdf/pdfium/fuzzers/pdfium_fuzzer.cc
diff --git a/pdf/pdfium/fuzzers/pdfium_fuzzer.cc b/pdf/pdfium/fuzzers/pdfium_fuzzer.cc
index b0d7b5de26c250081ce4da2df3a444d5bb3136b7..0b6f85dc36a9cd15cd18f3aebe499077932999c0 100644
--- a/pdf/pdfium/fuzzers/pdfium_fuzzer.cc
+++ b/pdf/pdfium/fuzzers/pdfium_fuzzer.cc
@@ -91,7 +91,11 @@ static void RenderPdf(const char* pBuf, size_t len) {
 
   FPDF_FORMFILLINFO form_callbacks;
   memset(&form_callbacks, '\0', sizeof(form_callbacks));
+#ifdef PDF_ENABLE_XFA
+  form_callbacks.version = 2;
+#else   // PDF_ENABLE_XFA
   form_callbacks.version = 1;
+#endif  // PDF_ENABLE_XFA
   form_callbacks.m_pJsPlatform = &platform_callbacks;
 
   TestLoader loader(pBuf, len);
@@ -143,6 +147,13 @@ static void RenderPdf(const char* pBuf, size_t len) {
   (void)FPDF_GetDocPermissions(doc);
 
   FPDF_FORMHANDLE form = FPDFDOC_InitFormFillEnvironment(doc, &form_callbacks);
+
+#ifdef PDF_ENABLE_XFA
+  int doc_type = DOCTYPE_PDF;
+  if (FPDF_HasXFAField(doc, &doc_type) && doc_type != DOCTYPE_PDF)
+    FPDF_LoadXFA(doc);
+#endif  // PDF_ENABLE_XFA
+
   FPDF_SetFormFieldHighlightColor(form, 0, 0xFFE4DD);
   FPDF_SetFormFieldHighlightAlpha(form, 100);