[strong] create strong array literals

src/runtime/runtime-scopes.cc

Index: src/runtime/runtime-scopes.cc
diff --git a/src/runtime/runtime-scopes.cc b/src/runtime/runtime-scopes.cc
index 9d35ffaed28305a53905ba8b13499619e0038a53..c48075a1faf87fba3c441caf6b192f20fa6e672b 100644
--- a/src/runtime/runtime-scopes.cc
+++ b/src/runtime/runtime-scopes.cc
@@ -525,7 +525,8 @@ RUNTIME_FUNCTION(Runtime_NewStrictArguments) {
 static Handle<JSArray> NewRestParam(Isolate* isolate,
                                     Object** parameters,
                                     int num_params,
-                                    int rest_index) {
+                                    int rest_index,
+                                    LanguageMode language_mode) {
   parameters -= rest_index;
   int num_elements = std::max(0, num_params - rest_index);
   Handle<FixedArray> elements =
@@ -534,25 +535,29 @@ static Handle<JSArray> NewRestParam(Isolate* isolate,
     elements->set(i, *--parameters);
   }
   return isolate->factory()->NewJSArrayWithElements(elements, FAST_ELEMENTS,
-                                                    num_elements);
+                                                    num_elements,
+                                                    strength(language_mode));
 }
 
 
 RUNTIME_FUNCTION(Runtime_NewRestParam) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 3);
+  DCHECK(args.length() == 4);
   Object** parameters = reinterpret_cast<Object**>(args[0]);
   CONVERT_SMI_ARG_CHECKED(num_params, 1);
   CONVERT_SMI_ARG_CHECKED(rest_index, 2);
+  CONVERT_SMI_ARG_CHECKED(language_mode, 3);
 
-  return *NewRestParam(isolate, parameters, num_params, rest_index);
+  return *NewRestParam(isolate, parameters, num_params, rest_index,
+                       static_cast<LanguageMode>(language_mode));
 }
 
 
 RUNTIME_FUNCTION(Runtime_NewRestParamSlow) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
+  DCHECK(args.length() == 2);
   CONVERT_SMI_ARG_CHECKED(rest_index, 0);
+  CONVERT_SMI_ARG_CHECKED(language_mode, 1);
 
   JavaScriptFrameIterator it(isolate);
 
@@ -563,7 +568,8 @@ RUNTIME_FUNCTION(Runtime_NewRestParamSlow) {
   int argument_count = frame->GetArgumentsLength();
   Object** parameters = reinterpret_cast<Object**>(frame->GetParameterSlot(-1));
 
-  return *NewRestParam(isolate, parameters, argument_count, rest_index);
+  return *NewRestParam(isolate, parameters, argument_count, rest_index,
+                       static_cast<LanguageMode>(language_mode));
 }