Use the right type for self in methods and remove obsoleted items.

Fixes #7411, #10615.

src/test/run-pass/self-in-mut-slot-immediate-value.rs

@@ -0,0 +1,30 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Assert that `mut self` on an immediate value doesn't
+// allow mutating the original - issue #10615.
+
+struct Value {
+    n: int
+}
+
+impl Value {
+    fn squared(mut self) -> Value {
+        self.n *= self.n;
+        self
+    }
+}
+
+pub fn main() {
+    let x = Value { n: 3 };
+    let y = x.squared();
+    assert_eq!(x.n, 3);
+    assert_eq!(y.n, 9);
+}