Standardize usage of virtual/override/final in ipc/

ipc/mojo/ipc_mojo_bootstrap.h

Index: ipc/mojo/ipc_mojo_bootstrap.h
diff --git a/ipc/mojo/ipc_mojo_bootstrap.h b/ipc/mojo/ipc_mojo_bootstrap.h
index 540becfbd2b7ffb823eae69443cfa1d24458f5b4..0d007ddbb72b4eabc1547db1a289ab73996bf808 100644
--- a/ipc/mojo/ipc_mojo_bootstrap.h
+++ b/ipc/mojo/ipc_mojo_bootstrap.h
@@ -41,7 +41,7 @@ class IPC_MOJO_EXPORT MojoBootstrap : public Listener {
                                           Delegate* delegate);
 
   MojoBootstrap();
-  virtual ~MojoBootstrap();
+  ~MojoBootstrap() override;
 
   // Start the handshake over the underlying platform channel.
   bool Connect();
@@ -68,8 +68,8 @@ class IPC_MOJO_EXPORT MojoBootstrap : public Listener {
   void Init(scoped_ptr<Channel> channel, Delegate* delegate);
 
   // Listener implementations
-  virtual void OnBadMessageReceived(const Message& message) override;
-  virtual void OnChannelError() override;
+  void OnBadMessageReceived(const Message& message) override;
+  void OnChannelError() override;
 
   scoped_ptr<Channel> channel_;
   Delegate* delegate_;