Add GetProperty/GetElement to JSReceiver and use it where possible

src/runtime/runtime-i18n.cc

Index: src/runtime/runtime-i18n.cc
diff --git a/src/runtime/runtime-i18n.cc b/src/runtime/runtime-i18n.cc
index e57f8d3626e2b7baeaf6d16bf395b7d952486b01..27f970bdb4b17392cee21a375e7a04a49c4985aa 100644
--- a/src/runtime/runtime-i18n.cc
+++ b/src/runtime/runtime-i18n.cc
@@ -158,8 +158,8 @@ RUNTIME_FUNCTION(Runtime_GetLanguageTagVariants) {
   Handle<Name> base = factory->NewStringFromStaticChars("base");
   for (unsigned int i = 0; i < length; ++i) {
     Handle<Object> locale_id;
-    ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, locale_id,
-                                       Object::GetElement(isolate, input, i));
+    ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+        isolate, locale_id, JSReceiver::GetElement(isolate, input, i));
     if (!locale_id->IsString()) {
       return isolate->Throw(*factory->illegal_argument_string());
     }