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

chrome/browser/chromeos/net/connectivity_state_helper.cc

 // Copyright (c) 2013 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 "chrome/browser/chromeos/net/connectivity_state_helper.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/network_library.h"
 #include "chromeos/chromeos_switches.h"
@@ skipping 47 matching lines @@
   virtual bool IsConnected() OVERRIDE;
   virtual bool IsConnecting() OVERRIDE;
   virtual bool IsConnectedType(const std::string& type) OVERRIDE;
   virtual bool IsConnectingType(const std::string& type) OVERRIDE;
   virtual std::string NetworkNameForType(const std::string& type) OVERRIDE;
   virtual std::string DefaultNetworkName() OVERRIDE;
   virtual bool DefaultNetworkOnline() OVERRIDE;
   virtual void RequestScan() const OVERRIDE;
 
   // NetworkLibrary::NetworkManagerObserver overrides.
-  virtual void OnNetworkManagerChanged(NetworkLibrary* network_library);
+  virtual void OnNetworkManagerChanged(
+      NetworkLibrary* network_library) OVERRIDE;
 
  private:
   NetworkLibrary* network_library_;
 };
 
 ConnectivityStateHelper::ConnectivityStateHelper() {
 }
 
 ConnectivityStateHelper::~ConnectivityStateHelper() {
 }
@@ skipping 199 matching lines @@
   network_library_->RequestNetworkScan();
 }
 
 void ConnectivityStateHelperNetworkLibrary::OnNetworkManagerChanged(
     NetworkLibrary* network_library) {
   FOR_EACH_OBSERVER(ConnectivityStateHelperObserver, connectivity_observers_,
                     NetworkManagerChanged());
 }
 
 }  // namespace chromeos