Mojo: More virtual/override style fixes in mojo/.

mojo/shell/external_application_registrar_connection.h

Index: mojo/shell/external_application_registrar_connection.h
diff --git a/mojo/shell/external_application_registrar_connection.h b/mojo/shell/external_application_registrar_connection.h
index 327d19b484153ae183b50262549ca8154b8c5704..dbe02e689aaddef483e1ebacd2c4df9a9b8ba43f 100644
--- a/mojo/shell/external_application_registrar_connection.h
+++ b/mojo/shell/external_application_registrar_connection.h
@@ -29,10 +29,10 @@ class ExternalApplicationRegistrarConnection : public ErrorHandler {
   // Configures client_socket_ to point at socket_path.
   explicit ExternalApplicationRegistrarConnection(
       const base::FilePath& socket_path);
-  virtual ~ExternalApplicationRegistrarConnection();
+  ~ExternalApplicationRegistrarConnection() override;
 
   // Implementation of ErrorHandler
-  virtual void OnConnectionError() override;
+  void OnConnectionError() override;
 
   // Connects client_socket_ and binds it to registrar_.
   // Status code is passed to callback upon success or failure.