canonicalize const

lib/runtime/dart/math.js

 var math;
 (function(exports) {
   'use strict';
   class _JenkinsSmiHash extends core.Object {
     static combine(hash, value) {
       hash = 536870911 & dart.notNull(hash) + dart.notNull(value);
       hash = 536870911 & dart.notNull(hash) + ((524287 & dart.notNull(hash)) << 10);
       return dart.notNull(hash) ^ dart.notNull(hash) >> 6;
     }
     static finish(hash) {
@@ skipping 48 matching lines @@
         return dart.as(dart.notNull(dx) * dart.notNull(dx) + dart.notNull(dy) * dart.notNull(dy), T);
       }
     }
     return Point;
   });
   let Point = Point$();
   class Random extends core.Object {
     Random(seed) {
       if (seed === void 0)
         seed = null;
-      return seed == null ? new _JSRandom() : new _Random(seed);
+      return seed == null ? dart.const(new _JSRandom()) : new _Random(seed);
     }
   }
   let _RectangleBase$ = dart.generic(function(T) {
     class _RectangleBase extends core.Object {
       _RectangleBase() {
       }
       get right() {
         return dart.as(this.left['+'](this.width), T);
       }
       get bottom() {
@@ skipping 369 matching lines @@
   exports.sin = sin;
   exports.cos = cos;
   exports.tan = tan;
   exports.acos = acos;
   exports.asin = asin;
   exports.atan = atan;
   exports.sqrt = sqrt;
   exports.exp = exp;
   exports.log = log;
 })(math || (math = {}));