Check whether a pdf has XFA fields before loading XFA fields

testing/embedder_test.cpp

 // Copyright (c) 2015 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "embedder_test.h"
 
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 238 matching lines @@
   (void) FPDFAvail_IsDocAvail(avail_, &hints_);
 
   if (!FPDFAvail_IsLinearized(avail_)) {
     document_ = FPDF_LoadCustomDocument(&file_access_, NULL);
   } else {
     document_ = FPDFAvail_GetDocument(avail_, NULL);
   }
   if (!document_) {
     return false;
   }
-  (void) FPDF_LoadXFA(document_);
+  int docType = DOCTYPE_PDF;
+  if (FPDF_HasXFAField(document_, docType))
+  {
+    if (docType != DOCTYPE_PDF)
+      (void) FPDF_LoadXFA(document_);
+  }
   (void) FPDF_GetDocPermissions(document_);
   (void) FPDFAvail_IsFormAvail(avail_, &hints_);
 
   IPDF_JSPLATFORM* platform = static_cast<IPDF_JSPLATFORM*>(this);
   memset(platform, 0, sizeof(IPDF_JSPLATFORM));
   platform->version = 1;
   platform->app_alert = AlertTrampoline;
 
   FPDF_FORMFILLINFO* formfillinfo = static_cast<FPDF_FORMFILLINFO*>(this);
   memset(formfillinfo, 0, sizeof(FPDF_FORMFILLINFO));
@@ skipping 70 matching lines @@
 }
 
 // Can't use gtest-provided main since we need to stash the path to the
 // executable in order to find the external V8 binary data files.
 int main(int argc, char** argv) {
   g_exe_path_ = argv[0];
   testing::InitGoogleTest(&argc, argv);
   testing::InitGoogleMock(&argc, argv);
   return RUN_ALL_TESTS();
 }