Sync the ChildNode and ParentNode interfaces with the spec

Source/core/dom/ChildNode.idl

Index: Source/core/dom/ChildNode.idl
diff --git a/Source/core/dom/ChildNode.idl b/Source/core/dom/ChildNode.idl
index c6de7e9282fbb4e33f982c3d3030ae64d32dde1f..8c2f9f3ac096a566b4af2a8f7ad23645dcfc7512 100644
--- a/Source/core/dom/ChildNode.idl
+++ b/Source/core/dom/ChildNode.idl
@@ -26,5 +26,9 @@
     LegacyTreatAsPartialInterface,
     NoInterfaceObject, // Always used on target of 'implements'
 ] interface ChildNode {
+    // [Unscopeable] void before((Node or DOMString)... nodes);
+    // [Unscopeable] void after((Node or DOMString)... nodes);
+    // [Unscopeable] void replaceWith((Node or DOMString)... nodes);
+    // TODO(philipj): remove() should be [Unscopeable]. crbug.com/462916
     [RaisesException, CustomElementCallbacks] void remove();
 };