Remove more oilpan.

sky/engine/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 56 matching lines @@
 };
 
 enum UpdateReason {
     UpdateForAccess,
     UpdateForPropertyChange
 };
 
 // MemoryCacheEntry class is used only in MemoryCache class, but we don't make
 // MemoryCacheEntry class an inner class of MemoryCache because of dependency
 // from MemoryCacheLRUList.
-class MemoryCacheEntry final : public DummyBase<MemoryCacheEntry> {
+class MemoryCacheEntry final {
 public:
     static PassOwnPtr<MemoryCacheEntry> create(Resource* resource) { return adoptPtr(new MemoryCacheEntry(resource)); }
     void trace(Visitor*);
 
     ResourcePtr<Resource> m_resource;
     bool m_inLiveDecodedResourcesList;
     unsigned m_accessCount;
     MemoryCacheLiveResourcePriority m_liveResourcePriority;
     double m_lastDecodedAccessTime; // Used as a thrash guard
 
@@ skipping 29 matching lines @@
     MemoryCacheLRUList() : m_head(nullptr), m_tail(nullptr) { }
     void trace(Visitor*);
 };
 
 }
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::MemoryCacheLRUList);
 
 namespace blink {
 
-class MemoryCache final : public DummyBase<MemoryCache> {
-    WTF_MAKE_NONCOPYABLE(MemoryCache); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
+class MemoryCache final {
+    WTF_MAKE_NONCOPYABLE(MemoryCache); WTF_MAKE_FAST_ALLOCATED;
 public:
     static PassOwnPtr<MemoryCache> create();
     ~MemoryCache();
     void trace(Visitor*);
 
     struct TypeStatistic {
         int count;
         int size;
         int liveSize;
         int decodedSize;
@@ skipping 147 matching lines @@
 // Returns the global cache.
 MemoryCache* memoryCache();
 
 // Sets the global cache, used to swap in a test instance. Returns the old
 // MemoryCache object.
 PassOwnPtr<MemoryCache> replaceMemoryCacheForTesting(PassOwnPtr<MemoryCache>);
 
 }
 
 #endif