base::Bind: Convert chrome_benchmarking_message_filter.cc.

net/disk_cache/mem_backend_impl.h

Index: net/disk_cache/mem_backend_impl.h
diff --git a/net/disk_cache/mem_backend_impl.h b/net/disk_cache/mem_backend_impl.h
index b6153d5e13534e655ecc0b45d944829791793b1f..85b0144b670ede7eb700740029882f300efa5bdd 100644
--- a/net/disk_cache/mem_backend_impl.h
+++ b/net/disk_cache/mem_backend_impl.h
@@ -87,6 +87,8 @@ class NET_EXPORT_PRIVATE MemBackendImpl : public Backend {
                                OldCompletionCallback* callback) OVERRIDE;
   virtual int OpenNextEntry(void** iter, Entry** next_entry,
                             OldCompletionCallback* callback) OVERRIDE;
+  virtual int OpenNextEntry(void** iter, Entry** next_entry,
+                            const net::CompletionCallback& callback) OVERRIDE;
   virtual void EndEnumeration(void** iter) OVERRIDE;
   virtual void GetStats(
       std::vector<std::pair<std::string, std::string> >* stats) OVERRIDE {}