Oilpan: eager resource disposal on MemoryCache eviction.

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 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 NoBaseWillBeGarbageCollectedFinalized<MemoryCacheEntry> {
 public:
-    static PassOwnPtrWillBeRawPtr<MemoryCacheEntry> create(Resource* resource) { return adoptPtrWillBeNoop(new MemoryCacheEntry(resource)); }
+    static PassOwnPtrWillBeRawPtr<MemoryCacheEntry> create(Resource* resource)
+    {
+        return adoptPtrWillBeNoop(new MemoryCacheEntry(resource));
+    }
     void trace(Visitor*);
+#if ENABLE(OILPAN)
+    void dispose();
+#endif
 
     ResourcePtr<Resource> m_resource;
     bool m_inLiveDecodedResourcesList;
     unsigned m_accessCount;
     MemoryCacheLiveResourcePriority m_liveResourcePriority;
     double m_lastDecodedAccessTime; // Used as a thrash guard
 
     RawPtrWillBeMember<MemoryCacheEntry> m_previousInLiveResourcesList;
     RawPtrWillBeMember<MemoryCacheEntry> m_nextInLiveResourcesList;
     RawPtrWillBeMember<MemoryCacheEntry> m_previousInAllResourcesList;
@@ skipping 204 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