[es6] Throw TypeError for computed static prototype property name

src/runtime/runtime-classes.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 #include <limits>
 
 #include "src/v8.h"
 
 #include "src/isolate-inl.h"
@@ skipping 38 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_ThrowArrayNotSubclassableError) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 0);
   THROW_NEW_ERROR_RETURN_FAILURE(
       isolate,
       NewTypeError("array_not_subclassable", HandleVector<Object>(NULL, 0)));
 }
 
 
+static Object* ThrowStaticPrototypeError(Isolate* isolate) {
+  THROW_NEW_ERROR_RETURN_FAILURE(
+      isolate, NewTypeError("static_prototype", HandleVector<Object>(NULL, 0)));
+}
+
+
+RUNTIME_FUNCTION(Runtime_ThrowStaticPrototypeError) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 0);
+  return ThrowStaticPrototypeError(isolate);
+}
+
+
+RUNTIME_FUNCTION(Runtime_ThrowIfStaticPrototype) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(Name, name, 0);
+  if (Name::Equals(name, isolate->factory()->prototype_string())) {
+    return ThrowStaticPrototypeError(isolate);
+  }
+  return *name;
+}
+
+
 RUNTIME_FUNCTION(Runtime_ToMethod) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1);
   Handle<JSFunction> clone = JSFunction::CloneClosure(fun);
   Handle<Symbol> home_object_symbol(isolate->heap()->home_object_symbol());
   JSObject::SetOwnPropertyIgnoreAttributes(clone, home_object_symbol,
                                            home_object, DONT_ENUM).Assert();
   return *clone;
@@ skipping 359 matching lines @@
   return *isolate->factory()->undefined_value();
 }
 
 
 RUNTIME_FUNCTION(Runtime_DefaultConstructorCallSuper) {
   UNREACHABLE();
   return nullptr;
 }
 }
 }  // namespace v8::internal