V8 Binding: Introduce toNativeWithTypeCheck

Source/bindings/tests/results/V8TestNode.cpp

Index: Source/bindings/tests/results/V8TestNode.cpp
diff --git a/Source/bindings/tests/results/V8TestNode.cpp b/Source/bindings/tests/results/V8TestNode.cpp
index 00902f1bf091a0d5b6e69eab92aa8510eb8436cf..8458e2358eb5f9cafc823320c10bfad8c5f555f3 100644
--- a/Source/bindings/tests/results/V8TestNode.cpp
+++ b/Source/bindings/tests/results/V8TestNode.cpp
@@ -227,6 +227,11 @@ bool V8TestNode::hasInstance(v8::Handle<v8::Value> jsValue, v8::Isolate* isolate
         || V8PerIsolateData::from(isolate)->hasInstanceInNonMainWorld(&wrapperTypeInfo, jsValue);
 }
 
+TestNode* V8TestNode::toNativeWithTypeCheck(v8::Isolate* isolate, v8::Handle<v8::Value> value)
+{
+    return hasInstance(value, isolate) ? fromInternalPointer(v8::Handle<v8::Object>::Cast(value)->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex)) : 0;
+}
+
 EventTarget* V8TestNode::toEventTarget(v8::Handle<v8::Object> object)
 {
     return toNative(object);