[builtins] Migrate String.prototype.charCodeAt and String.prototype.charAt to TurboFan.

src/runtime/runtime-internal.cc

Index: src/runtime/runtime-internal.cc
diff --git a/src/runtime/runtime-internal.cc b/src/runtime/runtime-internal.cc
index 8a5bdeb60dc1ca292a58db550f0f5332fb94fdab..d93ffdb846a8f2206031cce3002709deb4a3c18b 100644
--- a/src/runtime/runtime-internal.cc
+++ b/src/runtime/runtime-internal.cc
@@ -431,6 +431,13 @@ RUNTIME_FUNCTION(Runtime_ThrowCalledNonCallable) {
       isolate, NewTypeError(MessageTemplate::kCalledNonCallable, callsite));
 }
 
+RUNTIME_FUNCTION(Runtime_ThrowCalledOnNullOrUndefined) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(1, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
+  THROW_NEW_ERROR_RETURN_FAILURE(
+      isolate, NewTypeError(MessageTemplate::kCalledOnNullOrUndefined, name));
+}
 
 RUNTIME_FUNCTION(Runtime_ThrowConstructedNonConstructable) {
   HandleScope scope(isolate);