fpdfsdk/ differences with XFA (for didactic purposes only).

fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp

Index: fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp
diff --git a/fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp b/fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp
index 4b99ef2d831f97c51215c5428bd28ef15d73d8b6..e7f50e1b94f8a6283e66f8001b838636a32cb078 100644
--- a/fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp
+++ b/fpdfsdk/src/jsapi/fxjs_v8_embeddertest.cpp
@@ -30,6 +30,9 @@ class FXJSV8Embeddertest : public EmbedderTest {
     EmbedderTest::SetUp();
 
     v8::Isolate::Scope isolate_scope(m_pIsolate);
+#ifdef PDF_ENABLE_XFA
+    v8::Locker locker(m_pIsolate);
+#endif
     v8::HandleScope handle_scope(m_pIsolate);
     FXJS_PerIsolateData::SetUp(m_pIsolate);
     FXJS_InitializeRuntime(m_pIsolate, nullptr, &m_pPersistentContext,
@@ -57,6 +60,9 @@ class FXJSV8Embeddertest : public EmbedderTest {
 
 TEST_F(FXJSV8Embeddertest, Getters) {
   v8::Isolate::Scope isolate_scope(isolate());
+#ifdef PDF_ENABLE_XFA
+  v8::Locker locker(isolate());
+#endif
   v8::HandleScope handle_scope(isolate());
   v8::Context::Scope context_scope(GetV8Context());