Standardize usage of virtual/override/final in mojo/

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

 // Copyright 2014 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 MOJO_PUBLIC_CPP_BINDINGS_LIB_ROUTER_H_
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_ROUTER_H_
 
 #include <map>
 
 #include "mojo/public/cpp/bindings/lib/connector.h"
 #include "mojo/public/cpp/bindings/lib/filter_chain.h"
 #include "mojo/public/cpp/bindings/lib/shared_data.h"
 #include "mojo/public/cpp/environment/environment.h"
 
 namespace mojo {
 namespace internal {
 
 class Router : public MessageReceiverWithResponder {
  public:
   Router(ScopedMessagePipeHandle message_pipe,
          FilterChain filters,
          const MojoAsyncWaiter* waiter = Environment::GetDefaultAsyncWaiter());
-  virtual ~Router();
+  ~Router() override;
 
   // Sets the receiver to handle messages read from the message pipe that do
   // not have the kMessageIsResponse flag set.
   void set_incoming_receiver(MessageReceiverWithResponder* receiver) {
     incoming_receiver_ = receiver;
   }
 
   // Sets the error handler to receive notifications when an error is
   // encountered while reading from the pipe or waiting to read from the pipe.
   void set_error_handler(ErrorHandler* error_handler) {
     connector_.set_error_handler(error_handler);
   }
 
   // Returns true if an error was encountered while reading from the pipe or
   // waiting to read from the pipe.
   bool encountered_error() const { return connector_.encountered_error(); }
 
   void CloseMessagePipe() { connector_.CloseMessagePipe(); }
 
   ScopedMessagePipeHandle PassMessagePipe() {
     return connector_.PassMessagePipe();
   }
 
   // MessageReceiver implementation:
-  virtual bool Accept(Message* message) override;
-  virtual bool AcceptWithResponder(Message* message,
-                                   MessageReceiver* responder) override;
+  bool Accept(Message* message) override;
+  bool AcceptWithResponder(Message* message,
+                           MessageReceiver* responder) override;
 
   // Blocks the current thread for the first incoming method call, i.e., either
   // a call to a client method or a callback method.
   bool WaitForIncomingMessage() { return connector_.WaitForIncomingMessage(); }
 
   // Sets this object to testing mode.
   // In testing mode:
   // - the object is more tolerant of unrecognized response messages;
   // - the connector continues working after seeing errors from its incoming
   //   receiver.
   void EnableTestingMode();
 
  private:
   typedef std::map<uint64_t, MessageReceiver*> ResponderMap;
 
   class HandleIncomingMessageThunk : public MessageReceiver {
    public:
     HandleIncomingMessageThunk(Router* router);
-    virtual ~HandleIncomingMessageThunk();
+    ~HandleIncomingMessageThunk() override;
 
     // MessageReceiver implementation:
-    virtual bool Accept(Message* message) override;
+    bool Accept(Message* message) override;
 
    private:
     Router* router_;
   };
 
   bool HandleIncomingMessage(Message* message);
 
   HandleIncomingMessageThunk thunk_;
   FilterChain filters_;
   Connector connector_;
   SharedData<Router*> weak_self_;
   MessageReceiverWithResponder* incoming_receiver_;
   ResponderMap responders_;
   uint64_t next_request_id_;
   bool testing_mode_;
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_ROUTER_H_