[Binding] Add [OverrideBuiltins] label onto HTMLDocument interface

third_party/WebKit/Source/core/html/HTMLDocument.idl

Index: third_party/WebKit/Source/core/html/HTMLDocument.idl
diff --git a/third_party/WebKit/Source/core/html/HTMLDocument.idl b/third_party/WebKit/Source/core/html/HTMLDocument.idl
index 2b3f5b979fe3e1f288278e2806bd8fd15a4d7dbf..2f472d32ade43d241b6bf63552198f6f2ee16bb7 100644
--- a/third_party/WebKit/Source/core/html/HTMLDocument.idl
+++ b/third_party/WebKit/Source/core/html/HTMLDocument.idl
@@ -23,6 +23,7 @@
 // whose value is the Document interface object."
 // https://html.spec.whatwg.org/#the-window-object
 
+[OverrideBuiltins]
 interface HTMLDocument : Document {
     // https://html.spec.whatwg.org/#Document-partial
 
@@ -36,6 +37,9 @@ interface HTMLDocument : Document {
     [MeasureAs=DocumentCaptureEvents] void captureEvents();
     [MeasureAs=DocumentReleaseEvents] void releaseEvents();
 
+    [Custom, NotEnumerable] getter object (unsigned long index);
+    [Custom, NotEnumerable] getter object (DOMString name);
+
     // FIXME: all should not be [Replaceable].
     [Replaceable, ImplementedAs=allForBinding] readonly attribute HTMLAllCollection all;
 };