Fix closing namespace comments in //net.

net/disk_cache/blockfile/in_flight_backend_io.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/disk_cache/blockfile/in_flight_backend_io.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 544 matching lines @@
     BackendIO* operation) {
   background_thread_->PostTask(
       from_here, base::Bind(&BackendIO::ExecuteOperation, operation));
   OnOperationPosted(operation);
 }
 
 base::WeakPtr<InFlightBackendIO> InFlightBackendIO::GetWeakPtr() {
   return ptr_factory_.GetWeakPtr();
 }
 
-}  // namespace
+}  // namespace disk_cache