Not quite: that's "ASP.NET MVC", the razor view engine, "web pages", and some other libraries like Entity Framework and SignalR. Technically these are just libraries built on the closed-source ASP.NET stack, colloquially known as System.Web, which is essentially IIS.
In ASP.NET vNext, there is no System.Web any more. They have broken the core into separate components, and their source is in the OP link.