Oilpan: add lazy tracing annotations to recursive objects.

Source/core/fetch/MemoryCache.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 
     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.
 
@@ skipping 91 matching lines @@
         , m_liveResourcePriority(MemoryCacheLiveResourcePriorityLow)
         , m_lastDecodedAccessTime(0.0)
         , m_previousInLiveResourcesList(nullptr)
         , m_nextInLiveResourcesList(nullptr)
         , m_previousInAllResourcesList(nullptr)
         , m_nextInAllResourcesList(nullptr)
     {
     }
 };
 
+WILL_NOT_BE_EAGERLY_TRACED_CLASS(MemoryCacheEntry);
+
 // MemoryCacheLRUList is used only in MemoryCache class, but we don't make
 // MemoryCacheLRUList an inner struct of MemoryCache because we can't define
 // VectorTraits for inner structs.
 struct MemoryCacheLRUList final {
     ALLOW_ONLY_INLINE_ALLOCATION();
 public:
     RawPtrWillBeMember<MemoryCacheEntry> m_head;
     RawPtrWillBeMember<MemoryCacheEntry> m_tail;
 
     MemoryCacheLRUList() : m_head(nullptr), m_tail(nullptr) { }
@@ skipping 187 matching lines @@
 // Returns the global cache.
 MemoryCache* memoryCache();
 
 // Sets the global cache, used to swap in a test instance. Returns the old
 // MemoryCache object.
 PassOwnPtrWillBeRawPtr<MemoryCache> replaceMemoryCacheForTesting(PassOwnPtrWillBeRawPtr<MemoryCache>);
 
 }
 
 #endif