Revert "Implement script-side of callback reactions for Custom Elements V1"

third_party/WebKit/Source/bindings/core/v8/V8Binding.h

Index: third_party/WebKit/Source/bindings/core/v8/V8Binding.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8Binding.h b/third_party/WebKit/Source/bindings/core/v8/V8Binding.h
index d8a4231d49bc4a00fb14322593f0000467233fea..f18e9c4a9ed0bc5ad2d016ae31ccb8b69524a40d 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8Binding.h
+++ b/third_party/WebKit/Source/bindings/core/v8/V8Binding.h
@@ -414,13 +414,6 @@ inline v8::Local<v8::Value> v8StringOrNull(v8::Isolate* isolate, const AtomicStr
     return V8PerIsolateData::from(isolate)->getStringCache()->v8ExternalString(isolate, string.impl());
 }
 
-inline v8::Local<v8::Value> v8StringOrNull(v8::Isolate* isolate, const AtomicString& string)
-{
-    if (string.isNull())
-        return v8::Null(isolate);
-    return V8PerIsolateData::from(isolate)->getStringCache()->v8ExternalString(isolate, string.impl());
-}
-
 inline v8::Local<v8::String> v8String(v8::Isolate* isolate, const CompressibleString& string)
 {
     if (string.isNull())