Oilpan: add [WillBeGarbageCollected] for Node.

Source/core/dom/Node.idl

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 [
     Custom=Wrap,
     DependentLifetime,
+    WillBeGarbageCollected,
 ] interface Node : EventTarget {
     // NodeType
     const unsigned short      ELEMENT_NODE                   = 1;
     const unsigned short      ATTRIBUTE_NODE                 = 2;
     const unsigned short      TEXT_NODE                      = 3;
     const unsigned short      CDATA_SECTION_NODE             = 4;
     const unsigned short      ENTITY_REFERENCE_NODE          = 5; // EntityReference nodes are impossible to create in WebKit.
     const unsigned short      ENTITY_NODE                    = 6;
     const unsigned short      PROCESSING_INSTRUCTION_NODE    = 7;
     const unsigned short      COMMENT_NODE                   = 8;
@@ skipping 49 matching lines @@
     const unsigned short      DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20;
 
     unsigned short compareDocumentPosition(Node other);
 
     // Introduced in DOM4
     boolean contains(Node other);
 
     // IE extensions
     [PerWorldBindings] readonly attribute Element parentElement;
 };