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

third_party/WebKit/Source/bindings/tests/results/core/V8TestInterfaceCheckSecurity.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 "V8TestInterfaceCheckSecurity.h"
 
 #include "bindings/core/v8/BindingSecurity.h"
 #include "bindings/core/v8/ExceptionState.h"
@@ skipping 354 matching lines @@
     }
 }
 
 static void doNotCheckSecurityUnforgeableVoidMethodOriginSafeMethodGetterCallback(v8::Local<v8::Name>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestInterfaceCheckSecurityV8Internal::doNotCheckSecurityUnforgeableVoidMethodOriginSafeMethodGetter(info);
 }
 
 static void TestInterfaceCheckSecurityOriginSafeMethodSetter(v8::Local<v8::Name> name, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
+    if (!name->IsString())
+        return;
     v8::Local<v8::Object> holder = V8TestInterfaceCheckSecurity::findInstanceInPrototypeChain(info.This(), info.GetIsolate());
     if (holder.IsEmpty())
         return;
     TestInterfaceCheckSecurity* impl = V8TestInterfaceCheckSecurity::toImpl(holder);
     v8::String::Utf8Value attributeName(name);
     ExceptionState exceptionState(ExceptionState::SetterContext, *attributeName, "TestInterfaceCheckSecurity", info.Holder(), info.GetIsolate());
     if (!BindingSecurity::shouldAllowAccessTo(info.GetIsolate(), callingDOMWindow(info.GetIsolate()), impl, exceptionState)) {
         exceptionState.throwIfNeeded();
         return;
     }
@@ skipping 79 matching lines @@
 {
     return V8PerIsolateData::from(isolate)->findInstanceInPrototypeChain(&wrapperTypeInfo, v8Value);
 }
 
 TestInterfaceCheckSecurity* V8TestInterfaceCheckSecurity::toImplWithTypeCheck(v8::Isolate* isolate, v8::Local<v8::Value> value)
 {
     return hasInstance(value, isolate) ? toImpl(v8::Local<v8::Object>::Cast(value)) : 0;
 }
 
 } // namespace blink