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

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

Index: third_party/WebKit/Source/core/fetch/Resource.h
diff --git a/third_party/WebKit/Source/core/fetch/Resource.h b/third_party/WebKit/Source/core/fetch/Resource.h
index 78ab561c297aad02c79bd24f27af5620ec29edd5..513730d941971a3a04dd1c3115aee15aadaa166e 100644
--- a/third_party/WebKit/Source/core/fetch/Resource.h
+++ b/third_party/WebKit/Source/core/fetch/Resource.h
@@ -57,6 +57,7 @@ class SharedBuffer;
 // 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,
@@ -90,7 +91,7 @@ public:
     }
     virtual ~Resource();
 
-    virtual void removedFromMemoryCache();
+    void willDestroyResource();
     DECLARE_VIRTUAL_TRACE();
 
     void load(ResourceFetcher*);
@@ -263,6 +264,8 @@ protected:
     void didRemoveClientOrObserver();
     virtual void allClientsAndObserversRemoved();
 
+    virtual void willDestroyResourceInternal() { }
+
     HashCountedSet<ResourceClient*> m_clients;
     HashCountedSet<ResourceClient*> m_clientsAwaitingCallback;
     HashCountedSet<ResourceClient*> m_finishedClients;