dart2js: add common names to mangledGlobalNames in new emitter.

tests/language/cyclic_type_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Tests self referencing types.
 
 import "package:expect/expect.dart";
 
 class Base<T> {
   get t => T;
@@ skipping 10 matching lines @@
 
 // Derived1<U> and Derived2<V> are contractive.
 class Derived1<U> extends Base<Derived2<U>> {}   /// 03: ok
 class Derived2<V> extends Base<Derived1<V>> {}   /// 03: ok
 
 // Derived1<U> and Derived2<V> are non-contractive.
 class Derived1<U> extends Base<Derived2<U>> {}   /// 04: ok
 class Derived2<V> extends Base<Derived1<Derived2<V>>> {}   /// 04: ok
 
 main() {
+  // In the tests below we test that we get "int" and "bool" when calling
+  // toString() on the int and bool type respectively. This is not required
+  // behavior. However, we want to keep the original names for the most common
+  // core types so we make sure to handle these specifically in the compiler.
+
   var d;
   d = new Derived();  /// 00: continued
   Expect.equals("Derived", d.t.toString());  /// 00: continued
   d = new Derived<bool>();  /// 00: continued
   Expect.equals("Derived<bool>", d.t.toString());  /// 00: continued
   d = new Derived<Derived>();  /// 00: continued
   Expect.equals("Derived<Derived>", d.t.toString());  /// 00: continued
 
   d = new Derived();  /// 01: continued
+
   Expect.equals("Derived<Derived<int>>", d.t.toString());  /// 01: continued
   d = new Derived<bool>();  /// 01: continued
   Expect.equals("Derived<Derived<int>>", d.t.toString());  /// 01: continued
   d = new Derived<Derived>();  /// 01: continued
   Expect.equals("Derived<Derived<int>>", d.t.toString());  /// 01: continued
 
   d = new Derived();  /// 02: continued
   Expect.equals("Derived<Derived>", d.t.toString());  /// 02: continued
   d = new Derived<bool>();  /// 02: continued
   Expect.equals("Derived<Derived<bool>>", d.t.toString());  /// 02: continued
   d = new Derived<Derived>();  /// 02: continued
   Expect.equals("Derived<Derived<Derived>>", d.t.toString());  /// 02: continued
 
   d = new Derived1();  /// 03: continued
   Expect.equals("Derived2", d.t.toString());  /// 03: continued
   d = new Derived2();  /// 03: continued
   Expect.equals("Derived1", d.t.toString());  /// 03: continued
   d = new Derived2<Derived1<int>>();  /// 03: continued
   Expect.equals("Derived1<Derived1<int>>", d.t.toString());  /// 03: continued
 
   d = new Derived1();  /// 04: continued
   Expect.equals("Derived2", d.t.toString());  /// 04: continued
   d = new Derived2();  /// 04: continued
   Expect.equals("Derived1<Derived2>", d.t.toString());  /// 04: continued
   d = new Derived2<Derived1<int>>();  /// 04: continued
   Expect.equals("Derived1<Derived2<Derived1<int>>>", d.t.toString());  /// 04: continued
 }