Add a new attribute [Unintercept] to prohibit the interceptor of [length] to improve the binding pe…

Source/core/html/HTMLCollection.idl

Index: Source/core/html/HTMLCollection.idl
diff --git a/Source/core/html/HTMLCollection.idl b/Source/core/html/HTMLCollection.idl
index cab83cd617795259afefce1767726d3deb9e7266..715fd82754ee02602404edeeb4e405828b9c160d 100644
--- a/Source/core/html/HTMLCollection.idl
+++ b/Source/core/html/HTMLCollection.idl
@@ -25,7 +25,7 @@
     SetWrapperReferenceFrom=ownerNode,
     WillBeGarbageCollected,
 ] interface HTMLCollection {
-    readonly attribute unsigned long length;
+    [Unintercept] readonly attribute unsigned long length;
     getter Element item([Default=Undefined] optional unsigned long index);
     getter Element namedItem(DOMString name);
 };