Name and hoist types

tool/input_sdk/private/ddc_runtime/operations.dart

 // Copyright (c) 2015, 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.
 
 /// This library defines runtime operations on objects used by the code
 /// generator.
 part of dart._runtime;
 
 _canonicalFieldName(obj, name, args, displayName) => JS('', '''(() => {
   $name = $canonicalMember($obj, $name);
@@ skipping 538 matching lines @@
         invocation.namedArguments);
   }
   // Delegate to the (possibly user-defined) method on the object.
   var extension = getExtensionType(obj);
   if (extension != null) {
     return JS('', '#[dartx.noSuchMethod](#)', obj, invocation);
   }
   return JS('', '#.noSuchMethod(#)', obj, invocation);
 }
 
+constFn(x) => JS('', '() => x');
+
 runtimeType(obj) {
   // Handle primitives where the method isn't on the object.
   var result = _checkPrimitiveType(obj);
   if (result != null) return wrapType(result);
 
   // Delegate to the (possibly user-defined) method on the object.
   var extension = getExtensionType(obj);
   if (extension != null) {
     return JS('', '#[dartx.runtimeType]', obj);
   }
@@ skipping 17 matching lines @@
     constructor(dartIterator) {
       this.dartIterator = dartIterator;
     }
     next() {
       let i = this.dartIterator;
       let done = !i.moveNext();
       return { done: done, value: done ? void 0 : i.current };
     }
   }
 ''');