Standardize usage of virtual/override/final in mojo/

mojo/public/cpp/bindings/lib/connector.h

Index: mojo/public/cpp/bindings/lib/connector.h
diff --git a/mojo/public/cpp/bindings/lib/connector.h b/mojo/public/cpp/bindings/lib/connector.h
index dc598a6e72f214bb319995b1a0afa42b453b4bdf..7c1d445a3d6ad7ad8a53e8bb3cc7d9f1d0290279 100644
--- a/mojo/public/cpp/bindings/lib/connector.h
+++ b/mojo/public/cpp/bindings/lib/connector.h
@@ -29,7 +29,7 @@ class Connector : public MessageReceiver {
   explicit Connector(
       ScopedMessagePipeHandle message_pipe,
       const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter());
-  virtual ~Connector();
+  ~Connector() override;
 
   // Sets the receiver to handle messages read from the message pipe.  The
   // Connector will read messages from the pipe regardless of whether or not an
@@ -69,7 +69,7 @@ class Connector : public MessageReceiver {
   bool WaitForIncomingMessage();
 
   // MessageReceiver implementation:
-  virtual bool Accept(Message* message) override;
+  bool Accept(Message* message) override;
 
  private:
   static void CallOnHandleReady(void* closure, MojoResult result);