Update {virtual,override,final} to follow C++11 style in extensions, round 2.

extensions/shell/browser/shell_network_controller_chromeos.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_SHELL_BROWSER_SHELL_NETWORK_CONTROLLER_CHROMEOS_H_
 #define EXTENSIONS_SHELL_BROWSER_SHELL_NETWORK_CONTROLLER_CHROMEOS_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/timer/timer.h"
 #include "base/values.h"
 #include "chromeos/network/network_state_handler_observer.h"
 
 namespace extensions {
 
 // Handles network-related tasks for app_shell on Chrome OS.
 class ShellNetworkController : public chromeos::NetworkStateHandlerObserver {
  public:
   // This class must be instantiated after chromeos::DBusThreadManager and
   // destroyed before it.
   explicit ShellNetworkController(const std::string& preferred_network_name);
-  virtual ~ShellNetworkController();
+  ~ShellNetworkController() override;
 
   // chromeos::NetworkStateHandlerObserver overrides:
-  virtual void NetworkListChanged() override;
-  virtual void NetworkConnectionStateChanged(
+  void NetworkListChanged() override;
+  void NetworkConnectionStateChanged(
       const chromeos::NetworkState* state) override;
 
  private:
   // State of communication with the connection manager.
   enum State {
     // No in-progress requests.
     STATE_IDLE = 0,
     // Waiting for the result of an attempt to connect to the preferred network.
     STATE_WAITING_FOR_PREFERRED_RESULT,
     // Waiting for the result of an attempt to connect to a non-preferred
@@ skipping 36 matching lines @@
   bool preferred_network_is_active_;
 
   base::WeakPtrFactory<ShellNetworkController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellNetworkController);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_SHELL_BROWSER_SHELL_NETWORK_CONTROLLER_CHROMEOS_H_