Warn on missing OVERRIDE/virtual everywhere, not just in header files.

net/tools/quic/quic_dispatcher.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/tools/quic/quic_dispatcher.h"
 
 #include <errno.h>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "net/quic/quic_blocked_writer_interface.h"
 #include "net/quic/quic_utils.h"
 #include "net/tools/quic/quic_epoll_connection_helper.h"
 #include "net/tools/quic/quic_socket_utils.h"
 
 namespace net {
 namespace tools {
 
 using std::make_pair;
 
 class DeleteSessionsAlarm : public EpollAlarm {
  public:
   explicit DeleteSessionsAlarm(QuicDispatcher* dispatcher)
       : dispatcher_(dispatcher) {
   }
 
-  virtual int64 OnAlarm() {
+  virtual int64 OnAlarm() OVERRIDE {
     EpollAlarm::OnAlarm();
     dispatcher_->DeleteSessions();
     return 0;
   }
 
  private:
   QuicDispatcher* dispatcher_;
 };
 
 QuicDispatcher::QuicDispatcher(const QuicConfig& config,
@@ skipping 145 matching lines @@
       new QuicEpollConnectionHelper(this, epoll_server);
   return new QuicServerSession(
       config_, crypto_config_,
       new QuicConnection(guid, client_address, helper, true), this);
 }
 
 }  // namespace tools
 }  // namespace net