Always check that a Name is a String before converting it.

third_party/WebKit/Source/bindings/tests/results/core/V8TestSpecialOperationsNotEnumerable.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #include "V8TestSpecialOperationsNotEnumerable.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/V8DOMConfiguration.h"
@@ skipping 31 matching lines @@
     v8SetReturnValueString(info, result, info.GetIsolate());
 }
 
 static void indexedPropertyGetterCallback(uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestSpecialOperationsNotEnumerableV8Internal::indexedPropertyGetter(index, info);
 }
 
 static void namedPropertyGetter(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
+    if (!name->IsString())
+        return;
     auto nameString = name.As<v8::String>();
     TestSpecialOperationsNotEnumerable* impl = V8TestSpecialOperationsNotEnumerable::toImpl(info.Holder());
     AtomicString propertyName = toCoreAtomicString(nameString);
     String result = impl->anonymousNamedGetter(propertyName);
     if (result.isNull())
         return;
     v8SetReturnValueString(info, result, info.GetIsolate());
 }
 
 static void namedPropertyGetterCallback(v8::Local<v8::Name> name, const v8::PropertyCallbackInfo<v8::Value>& info)
@@ skipping 38 matching lines @@
 {
     return V8PerIsolateData::from(isolate)->findInstanceInPrototypeChain(&wrapperTypeInfo, v8Value);
 }
 
 TestSpecialOperationsNotEnumerable* V8TestSpecialOperationsNotEnumerable::toImplWithTypeCheck(v8::Isolate* isolate, v8::Local<v8::Value> value)
 {
     return hasInstance(value, isolate) ? toImpl(v8::Local<v8::Object>::Cast(value)) : 0;
 }
 
 } // namespace blink