Oilpan: avoid disabling GC plugin checks over Node.

Source/core/dom/Node.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004-2011, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.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
@@ skipping 105 matching lines @@
 WILL_HAVE_ALL_INSTANCES_ON_SAME_GC_HEAP(Node);
 
 #if ENABLE(OILPAN)
 #define NODE_BASE_CLASSES public EventTarget
 #else
 // TreeShared should be the last to pack TreeShared::m_refCount and
 // Node::m_nodeFlags on 64bit platforms.
 #define NODE_BASE_CLASSES public EventTarget, public TreeShared<Node>
 #endif
 
-class GC_PLUGIN_IGNORE("crbug.com/443854") Node : NODE_BASE_CLASSES {
+class Node : NODE_BASE_CLASSES {
     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(TreeShared<Node>);
     DEFINE_WRAPPERTYPEINFO();
     friend class TreeScope;
     friend class TreeScopeAdopter;
 public:
     enum NodeType {
         ELEMENT_NODE = 1,
         ATTRIBUTE_NODE = 2,
         TEXT_NODE = 3,
         CDATA_SECTION_NODE = 4,
@@ skipping 23 matching lines @@
         DOCUMENT_POSITION_CONTAINS = 0x08,
         DOCUMENT_POSITION_CONTAINED_BY = 0x10,
         DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20,
     };
 
 #if ENABLE(OILPAN)
     // Node is now a GarbageCollected<EventTarget> instead of a GarbageCollected<Node>, which confuses Oilpan's
     // static type dispatching of typed heap for Nodes. We override GarbageCollected<>'s operator new here, to put
     // Node descendants into typed heap for Nodes. <http://crbug.com/443854>
     using GarbageCollectedBase = EventTarget;
+
+    GC_PLUGIN_IGNORE("crbug.com/443854")
     void* operator new(size_t size) { return Heap::allocate<Node>(size); }
 #else // !ENABLE(OILPAN)
     // All Nodes are placed in their own heap partition for security.
     // See http://crbug.com/246860 for detail.
     void* operator new(size_t);
     void operator delete(void*);
 #endif
 
     static void dumpStatistics();
 
@@ skipping 721 matching lines @@
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showNode(const blink::Node*);
 void showTree(const blink::Node*);
 void showNodePath(const blink::Node*);
 #endif
 
 #endif // Node_h