Handle dynamic as bottom inside of function type reps

lib/runtime/dart/math.js

 dart_library.library('dart/math', null, /* Imports */[
   "dart_runtime/dart",
   'dart/core'
 ], /* Lazy imports */[
   'dart/_js_helper'
 ], function(exports, dart, core, _js_helper) {
   'use strict';
   let dartx = dart.dartx;
   class _JenkinsSmiHash extends core.Object {
     static combine(hash, value) {
@@ skipping 10 matching lines @@
       return _JenkinsSmiHash.finish(_JenkinsSmiHash.combine(_JenkinsSmiHash.combine(0, dart.as(a, core.int)), dart.as(b, core.int)));
     }
     static hash4(a, b, c, d) {
       return _JenkinsSmiHash.finish(_JenkinsSmiHash.combine(_JenkinsSmiHash.combine(_JenkinsSmiHash.combine(_JenkinsSmiHash.combine(0, dart.as(a, core.int)), dart.as(b, core.int)), dart.as(c, core.int)), dart.as(d, core.int)));
     }
   }
   dart.setSignature(_JenkinsSmiHash, {
     statics: () => ({
       combine: [core.int, [core.int, core.int]],
       finish: [core.int, [core.int]],
-      hash2: [core.int, [core.Object, core.Object]],
-      hash4: [core.int, [core.Object, core.Object, core.Object, core.Object]]
+      hash2: [core.int, [dart.dynamic, dart.dynamic]],
+      hash4: [core.int, [dart.dynamic, dart.dynamic, dart.dynamic, dart.dynamic]]
     }),
     names: ['combine', 'finish', 'hash2', 'hash4']
   });
   let Point$ = dart.generic(function(T) {
     class Point extends core.Object {
       Point(x, y) {
         this.x = x;
         this.y = y;
       }
       toString() {
@@ skipping 475 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;
 });