Standardize usage of virtual/override/final in components/

components/nacl/loader/nacl_ipc_adapter.h

Index: components/nacl/loader/nacl_ipc_adapter.h
diff --git a/components/nacl/loader/nacl_ipc_adapter.h b/components/nacl/loader/nacl_ipc_adapter.h
index a18aed7959d9aef541e581389c510f92a5bba8af..4a0a4b77aa09899df3e3cfd66cdef01ab5bf0aab 100644
--- a/components/nacl/loader/nacl_ipc_adapter.h
+++ b/components/nacl/loader/nacl_ipc_adapter.h
@@ -111,9 +111,9 @@ class NaClIPCAdapter : public base::RefCountedThreadSafe<NaClIPCAdapter>,
 #endif
 
   // Listener implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
-  virtual void OnChannelConnected(int32 peer_pid) override;
-  virtual void OnChannelError() override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+  void OnChannelConnected(int32 peer_pid) override;
+  void OnChannelError() override;
 
   typedef base::Callback<void(IPC::PlatformFileForTransit, base::FilePath)>
       ResolveFileTokenReplyCallback;
@@ -175,7 +175,7 @@ class NaClIPCAdapter : public base::RefCountedThreadSafe<NaClIPCAdapter>,
     PendingSyncMsgMap pending_sync_msgs_;
   };
 
-  virtual ~NaClIPCAdapter();
+  ~NaClIPCAdapter() override;
 
   void OnFileTokenResolved(const IPC::Message& orig_msg,
                            IPC::PlatformFileForTransit ipc_fd,