[WeakMemoryCache 1a] Make Reference from Inspector to Resource weak, remove removedFromMemoryCache()

third_party/WebKit/Source/core/fetch/Resource.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 39 matching lines @@
 class ResourceTimingInfo;
 class ResourceLoader;
 class SecurityOrigin;
 class SharedBuffer;
 
 // A resource that is held in the cache. Classes who want to use this object should derive
 // from ResourceClient, to get the function calls in case the requested data has arrived.
 // This class also does the actual communication with the loader to obtain the resource from the network.
 class CORE_EXPORT Resource : public GarbageCollectedFinalized<Resource> {
     WTF_MAKE_NONCOPYABLE(Resource);
+    USING_PRE_FINALIZER(Resource, willDestroyResource);
 public:
     enum Type {
         MainResource,
         Image,
         CSSStyleSheet,
         Script,
         Font,
         Raw,
         SVGDocument,
         XSLStyleSheet,
@@ skipping 13 matching lines @@
         DecodeError
     };
 
     // Exposed for testing.
     static Resource* create(const ResourceRequest& request, Type type, const ResourceLoaderOptions& options = ResourceLoaderOptions())
     {
         return new Resource(request, type, options);
     }
     virtual ~Resource();
 
-    virtual void removedFromMemoryCache();
+    void willDestroyResource();
     DECLARE_VIRTUAL_TRACE();
 
     void load(ResourceFetcher*);
 
     virtual void setEncoding(const String&) { }
     virtual String encoding() const { return String(); }
     virtual void appendData(const char*, size_t);
     virtual void error(const ResourceError&);
     virtual void setCORSFailed() { }
 
@@ skipping 152 matching lines @@
 
     void finishPendingClients();
 
     virtual void didAddClient(ResourceClient*);
     void willAddClientOrObserver();
 
     // |this| object may be dead after didRemoveClientOrObserver().
     void didRemoveClientOrObserver();
     virtual void allClientsAndObserversRemoved();
 
+    virtual void willDestroyResourceInternal() { }
+
     HashCountedSet<ResourceClient*> m_clients;
     HashCountedSet<ResourceClient*> m_clientsAwaitingCallback;
     HashCountedSet<ResourceClient*> m_finishedClients;
 
     bool hasClient(ResourceClient* client) { return m_clients.contains(client) || m_clientsAwaitingCallback.contains(client) || m_finishedClients.contains(client); }
 
     struct RedirectPair {
         DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
     public:
         explicit RedirectPair(const ResourceRequest& request, const ResourceResponse& redirectResponse)
@@ skipping 87 matching lines @@
 
     Resource::Type m_type;
 };
 
 #define DEFINE_RESOURCE_TYPE_CASTS(typeName) \
     DEFINE_TYPE_CASTS(typeName##Resource, Resource, resource, resource->getType() == Resource::typeName, resource.getType() == Resource::typeName);
 
 } // namespace blink
 
 #endif