V8 Binding: Introduce toNativeWithTypeCheck

Source/bindings/tests/results/V8TestInterfaceNode.cpp

Index: Source/bindings/tests/results/V8TestInterfaceNode.cpp
diff --git a/Source/bindings/tests/results/V8TestInterfaceNode.cpp b/Source/bindings/tests/results/V8TestInterfaceNode.cpp
index 675146a4062ea0f0a50526814cd8f7b710ef170a..7b361774969c5ec3dc631ae3ff749d2d85643623 100644
--- a/Source/bindings/tests/results/V8TestInterfaceNode.cpp
+++ b/Source/bindings/tests/results/V8TestInterfaceNode.cpp
@@ -355,6 +355,11 @@ bool V8TestInterfaceNode::hasInstance(v8::Handle<v8::Value> jsValue, v8::Isolate
         || V8PerIsolateData::from(isolate)->hasInstanceInNonMainWorld(&wrapperTypeInfo, jsValue);
 }
 
+TestInterfaceNode* V8TestInterfaceNode::toNativeWithTypeCheck(v8::Isolate* isolate, v8::Handle<v8::Value> value)
+{
+    return hasInstance(value, isolate) ? fromInternalPointer(v8::Handle<v8::Object>::Cast(value)->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex)) : 0;
+}
+
 EventTarget* V8TestInterfaceNode::toEventTarget(v8::Handle<v8::Object> object)
 {
     return toNative(object);