Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/io_thread.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 CHROME_BROWSER_IO_THREAD_H_
 #define CHROME_BROWSER_IO_THREAD_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 195 matching lines @@
     scoped_ptr<data_reduction_proxy::DataReductionProxyDelegate>
         data_reduction_proxy_delegate;
   };
 
   // |net_log| must either outlive the IOThread or be NULL.
   IOThread(PrefService* local_state,
            policy::PolicyService* policy_service,
            ChromeNetLog* net_log,
            extensions::EventRouterForwarder* extension_event_router_forwarder);
 
-  virtual ~IOThread();
+  ~IOThread() override;
 
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
   // Can only be called on the IO thread.
   Globals* globals();
 
   // Allows overriding Globals in tests where IOThread::Init() and
   // IOThread::CleanUp() are not called.  This allows for injecting mocks into
   // IOThread global objects.
   void SetGlobalsForTesting(Globals* globals);
@@ skipping 21 matching lines @@
 
   // Provide SystemURLRequestContextGetter with access to
   // InitSystemRequestContext().
   friend class SystemURLRequestContextGetter;
 
   friend class test::IOThreadPeer;
 
   // BrowserThreadDelegate implementation, runs on the IO thread.
   // This handles initialization and destruction of state that must
   // live on the IO thread.
-  virtual void Init() override;
-  virtual void InitAsync() override;
-  virtual void CleanUp() override;
+  void Init() override;
+  void InitAsync() override;
+  void CleanUp() override;
 
   // Initializes |params| based on the settings in |globals|.
   static void InitializeNetworkSessionParamsFromGlobals(
       const Globals& globals,
       net::HttpNetworkSession::Params* params);
 
   void InitializeNetworkOptions(const base::CommandLine& parsed_command_line);
 
   // Sets up TCP FastOpen if enabled via field trials or via the command line.
   void ConfigureTCPFastOpen(const base::CommandLine& command_line);
@@ skipping 181 matching lines @@
   bool is_spdy_disabled_by_policy_;
 
   const base::TimeTicks creation_time_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOThread);
 };
 
 #endif  // CHROME_BROWSER_IO_THREAD_H_