Remove uses of VisitDOMWrapper

third_party/WebKit/Source/bindings/IDLExtendedAttributes.md

Index: third_party/WebKit/Source/bindings/IDLExtendedAttributes.md
diff --git a/third_party/WebKit/Source/bindings/IDLExtendedAttributes.md b/third_party/WebKit/Source/bindings/IDLExtendedAttributes.md
index 9d5dd81304b186b575fed42eeb257db22b6a2ae9..d62a4af1ed9e86231fd871b79c8cfe6542a53b11 100644
--- a/third_party/WebKit/Source/bindings/IDLExtendedAttributes.md
+++ b/third_party/WebKit/Source/bindings/IDLExtendedAttributes.md
@@ -847,30 +847,6 @@ v8::Handle<v8::Value> V8XXX::callAsFunctionCallback(const v8::Arguments& args)
 }
 ```
 
-#### [Custom=VisitDOMWrapper] _(i)_
-
-
-Summary: Allows you to write custom code for visitDOMWrapper: like `[SetWrapperReferenceFrom]`, but with custom code. One use (Nodelist.idl).
-
-Usage:
-
-```webidl
-[
-    Custom=VisitDOMWrapper,
-] interface XXX {
-    ...
-};
-```
-
-And then in V8XXXCustom.cpp:
-
-```c++
-void V8XXX::visitDOMWrapperCustom(v8::Isolate* isolate, ScriptWrappable* scriptWrappable, v8::Persistent<v8::Object> wrapper)
-{
-    ...
-}
-```
-
 ### [CustomElementCallbacks] _(m, a)_
 
 Summary: Wraps the method/accessor with a Custom Elements "callback delivery scope" which will dispatch Custom Element callbacks (createdCallback, attributeChangedCallback, etc.) before returning to script.