base::Bind: Convert chrome_benchmarking_message_filter.cc.

net/disk_cache/mem_backend_impl.cc

Index: net/disk_cache/mem_backend_impl.cc
diff --git a/net/disk_cache/mem_backend_impl.cc b/net/disk_cache/mem_backend_impl.cc
index d760b390e770d2fda34a335a6b875af40869db9e..8cdf0ac21b99e2352b190aaf184eca0f87c0dade 100644
--- a/net/disk_cache/mem_backend_impl.cc
+++ b/net/disk_cache/mem_backend_impl.cc
@@ -216,6 +216,14 @@ int MemBackendImpl::OpenNextEntry(void** iter, Entry** next_entry,
   return net::ERR_FAILED;
 }
 
+int MemBackendImpl::OpenNextEntry(void** iter, Entry** next_entry,
+                                  const net::CompletionCallback& callback) {
+  if (OpenNextEntry(iter, next_entry))
+    return net::OK;
+
+  return net::ERR_FAILED;
+}
+
 void MemBackendImpl::EndEnumeration(void** iter) {
   *iter = NULL;
 }