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

fpdfsdk/src/javascript/JS_Runtime.h

Index: fpdfsdk/src/javascript/JS_Runtime.h
diff --git a/fpdfsdk/src/javascript/JS_Runtime.h b/fpdfsdk/src/javascript/JS_Runtime.h
index 6fc3894f440af744bf404a85e24a23b763ae2c21..8215b889946ffbc751f2dc3e066840f2aa59fc0d 100644
--- a/fpdfsdk/src/javascript/JS_Runtime.h
+++ b/fpdfsdk/src/javascript/JS_Runtime.h
@@ -58,6 +58,9 @@ class CJS_Runtime : public IJS_Runtime {
   v8::Isolate* GetIsolate() const { return m_isolate; }
   v8::Local<v8::Context> NewJSContext();
 
+  void SetConstArray(const CFX_WideString& name, v8::Local<v8::Array> array);
+  v8::Local<v8::Array> GetConstArray(const CFX_WideString& name);
+
 #ifdef PDF_ENABLE_XFA
   FX_BOOL GetHValueByName(const CFX_ByteStringC& utf8Name,
                           FXJSE_HVALUE hValue) override;
@@ -80,6 +83,7 @@ class CJS_Runtime : public IJS_Runtime {
   bool m_isolateManaged;
   v8::Global<v8::Context> m_context;
   std::vector<v8::Global<v8::Object>*> m_StaticObjects;
+  std::map<CFX_WideString, v8::Global<v8::Array>> m_ConstArrays;
   std::set<Observer*> m_observers;
 };