Merge to M50: Re-land "Only place primitive objects on the V8 global template."

fpdfsdk/src/javascript/JS_Runtime.cpp

Index: fpdfsdk/src/javascript/JS_Runtime.cpp
diff --git a/fpdfsdk/src/javascript/JS_Runtime.cpp b/fpdfsdk/src/javascript/JS_Runtime.cpp
index 76221db3f2084e94a8fa34c9bef283ddc1fef663..88696e5110d39ab84f6d73152e1bcd2d27d6a1ff 100644
--- a/fpdfsdk/src/javascript/JS_Runtime.cpp
+++ b/fpdfsdk/src/javascript/JS_Runtime.cpp
@@ -121,6 +121,7 @@ CJS_Runtime::~CJS_Runtime() {
     delete m_ContextArray.GetAt(i);
 
   m_ContextArray.RemoveAll();
+  m_ConstArrays.clear();
   FXJS_ReleaseRuntime(GetIsolate(), &m_context, &m_StaticObjects);
 
   m_pApp = NULL;
@@ -256,6 +257,15 @@ v8::Local<v8::Context> CJS_Runtime::NewJSContext() {
   return v8::Local<v8::Context>::New(m_isolate, m_context);
 }
 
+void CJS_Runtime::SetConstArray(const CFX_WideString& name,
+                                v8::Local<v8::Array> array) {
+  m_ConstArrays[name] = v8::Global<v8::Array>(m_isolate, array);
+}
+
+v8::Local<v8::Array> CJS_Runtime::GetConstArray(const CFX_WideString& name) {
+  return v8::Local<v8::Array>::New(m_isolate, m_ConstArrays[name]);
+}
+
 #ifdef PDF_ENABLE_XFA
 CFX_WideString ChangeObjName(const CFX_WideString& str) {
   CFX_WideString sRet = str;