Re-land "Only place primitive objects on the V8 global template.""

fpdfsdk/src/jsapi/fxjs_v8.cpp

Index: fpdfsdk/src/jsapi/fxjs_v8.cpp
diff --git a/fpdfsdk/src/jsapi/fxjs_v8.cpp b/fpdfsdk/src/jsapi/fxjs_v8.cpp
index f015f87136e001e94b5bfcd35c7f07557ac8fff1..5631ab625859e95f5fd73ff7e0e2db14a26019eb 100644
--- a/fpdfsdk/src/jsapi/fxjs_v8.cpp
+++ b/fpdfsdk/src/jsapi/fxjs_v8.cpp
@@ -287,14 +287,15 @@ void FXJS_DefineGlobalMethod(v8::Isolate* pIsolate,
 
 void FXJS_DefineGlobalConst(v8::Isolate* pIsolate,
                             const wchar_t* sConstName,
-                            v8::Local<v8::Value> pDefault) {
+                            v8::FunctionCallback pConstGetter) {
   v8::Isolate::Scope isolate_scope(pIsolate);
   v8::HandleScope handle_scope(pIsolate);
   CFX_ByteString bsConst = CFX_WideString(sConstName).UTF8Encode();
-  GetGlobalObjectTemplate(pIsolate)->Set(
-      v8::String::NewFromUtf8(pIsolate, bsConst.c_str(),
-                              v8::NewStringType::kNormal).ToLocalChecked(),
-      pDefault, v8::ReadOnly);
+  GetGlobalObjectTemplate(pIsolate)
+      ->SetAccessorProperty(v8::String::NewFromUtf8(pIsolate, bsConst.c_str(),
+                                                    v8::NewStringType::kNormal)
+                                .ToLocalChecked(),
+                            v8::FunctionTemplate::New(pIsolate, pConstGetter));
 }
 
 void FXJS_InitializeRuntime(