Standardize usage of virtual/override/final in remoting/

remoting/host/policy_hack/fake_policy_watcher.h

 // 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.
 
 #ifndef REMOTING_HOST_POLICY_HACK_FAKE_POLICY_WATCHER_H_
 #define REMOTING_HOST_POLICY_HACK_FAKE_POLICY_WATCHER_H_
 
 #include "remoting/host/policy_hack/policy_watcher.h"
 
 namespace remoting {
 namespace policy_hack {
 
 class FakePolicyWatcher : public PolicyWatcher {
  public:
   explicit FakePolicyWatcher(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
-  virtual ~FakePolicyWatcher();
+  ~FakePolicyWatcher() override;
 
   void SetPolicies(const base::DictionaryValue* policies);
 
  protected:
-  virtual void StartWatchingInternal() override;
-  virtual void StopWatchingInternal() override;
-  virtual void Reload() override;
+  void StartWatchingInternal() override;
+  void StopWatchingInternal() override;
+  void Reload() override;
 };
 
 }  // namespace policy_hack
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_POLICY_HACK_FAKE_POLICY_WATCHER_H_