IDL compiler: merge and simplify EventHandler non-callable value check

Source/bindings/v8/V8EventListenerList.h

Index: Source/bindings/v8/V8EventListenerList.h
diff --git a/Source/bindings/v8/V8EventListenerList.h b/Source/bindings/v8/V8EventListenerList.h
index 1074983653612b23e81bb4534261ead90aa21e3e..78f3b84770f3f61a209c69d96251a9e9fdeab983 100644
--- a/Source/bindings/v8/V8EventListenerList.h
+++ b/Source/bindings/v8/V8EventListenerList.h
@@ -49,16 +49,13 @@ enum ListenerLookupType {
 // This is a container for V8EventListener objects that uses hidden properties of v8::Object to speed up lookups.
 class V8EventListenerList {
 public:
-    static PassRefPtr<V8EventListener> findWrapper(v8::Local<v8::Value> value, bool isAttribute, v8::Isolate* isolate)
+    static PassRefPtr<V8EventListener> findWrapper(v8::Local<v8::Value> value, v8::Isolate* isolate)
     {
         ASSERT(v8::Context::InContext());
-        // Non-callable input should be treated as null
-        if (!value->IsNull() && !value->IsFunction())
-            value = v8::Null(isolate);
         if (!value->IsObject())
             return 0;
 
-        v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute, isolate);
+        v8::Handle<v8::String> wrapperProperty = getHiddenProperty(false, isolate);
         return doFindWrapper(v8::Local<v8::Object>::Cast(value), wrapperProperty, isolate);
     }
 
@@ -94,10 +91,9 @@ template<typename WrapperType>
 PassRefPtr<V8EventListener> V8EventListenerList::findOrCreateWrapper(v8::Local<v8::Value> value, bool isAttribute, v8::Isolate* isolate)
 {
     ASSERT(v8::Context::InContext());
-    // Non-callable attribute setter input should be treated as null
-    if (isAttribute && !value->IsNull() && !value->IsFunction())
-        value = v8::Null(isolate);
-    if (!value->IsObject())
+    if (!value->IsObject()
+        // Non-callable attribute setter input is treated as null (no wrapper)
+        || (isAttribute && !value->IsFunction()))
         return 0;
 
     v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value);