binding: Indexed property returns undefined if out-of-range.

third_party/WebKit/Source/bindings/tests/results/modules/V8TestInterface5.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 "V8TestInterface5.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/GeneratedCodeHelper.h"
@@ skipping 758 matching lines @@
 
 void namedPropertyEnumeratorCallback(const v8::PropertyCallbackInfo<v8::Array>& info)
 {
     TestInterface5ImplementationV8Internal::namedPropertyEnumerator(info);
 }
 
 static void indexedPropertyGetter(uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestInterface5Implementation* impl = V8TestInterface5::toImpl(info.Holder());
 
+    // We assume that all the implementations support length() method, although
+    // the spec doesn't require that length() must exist.  It's okay that
+    // the interface does not have length attribute as long as the
+    // implementation supports length() member function.
+    if (index >= impl->length())
+        return;  // Returns undefined due to out-of-range.
+
     String result = impl->anonymousIndexedGetter(index);
-    if (result.isNull())
-        return;
     v8SetReturnValueString(info, result, info.GetIsolate());
 }
 
 void indexedPropertyGetterCallback(uint32_t index, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TestInterface5ImplementationV8Internal::indexedPropertyGetter(index, info);
 }
 
 static void indexedPropertySetter(uint32_t index, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
@@ skipping 166 matching lines @@
         const V8DOMConfiguration::MethodConfiguration windowExposedStaticMethodMethodConfiguration = {"windowExposedStaticMethod", TestInterface5ImplementationV8Internal::windowExposedStaticMethodMethodCallback, 0, 0, v8::None, V8DOMConfiguration::ExposedToAllScripts, V8DOMConfiguration::OnInterface};
         V8DOMConfiguration::installMethod(isolate, world, v8::Local<v8::Object>(), prototypeObject, interfaceObject, signature, windowExposedStaticMethodMethodConfiguration);
     }
     if (executionContext && (executionContext->isDocument() || executionContext->isServiceWorkerGlobalScope())) {
         const V8DOMConfiguration::MethodConfiguration windowAndServiceWorkerExposedMethodMethodConfiguration = {"windowAndServiceWorkerExposedMethod", TestInterface5ImplementationV8Internal::windowAndServiceWorkerExposedMethodMethodCallback, 0, 0, v8::None, V8DOMConfiguration::ExposedToAllScripts, V8DOMConfiguration::OnPrototype};
         V8DOMConfiguration::installMethod(isolate, world, v8::Local<v8::Object>(), prototypeObject, interfaceObject, signature, windowAndServiceWorkerExposedMethodMethodConfiguration);
     }
 }
 
 } // namespace blink