implement tear offs

lib/runtime/dart/collection.js

 var collection;
 (function(exports) {
   'use strict';
   let _source = Symbol('_source');
   let UnmodifiableListView$ = dart.generic(function(E) {
     class UnmodifiableListView extends _internal.UnmodifiableListBase$(E) {
       UnmodifiableListView(source) {
         this[_source] = source;
       }
       get [core.$length]() {
@@ skipping 1590 matching lines @@
           throw _internal.IterableElementError.noElement();
         }
         let result = this[core.$get](dart.notNull(this[core.$length]) - 1);
         this[core.$length] = dart.notNull(this[core.$length]) - 1;
         return result;
       }
       [core.$sort](compare) {
         if (compare === void 0)
           compare = null;
         if (compare == null) {
-          let defaultCompare = core.Comparable.compare;
+          let defaultCompare = dart.bind(core.Comparable, 'compare');
           compare = defaultCompare;
         }
         _internal.Sort.sort(this, compare);
       }
       [core.$shuffle](random) {
         if (random === void 0)
           random = null;
         if (random == null)
           random = new math.Random();
         let length = this[core.$length];
@@ skipping 1238 matching lines @@
   let _comparator = Symbol('_comparator');
   let _validKey = Symbol('_validKey');
   let _internal = Symbol('_internal');
   let SplayTreeMap$ = dart.generic(function(K, V) {
     class SplayTreeMap extends _SplayTree$(K) {
       SplayTreeMap(compare, isValidKey) {
         if (compare === void 0)
           compare = null;
         if (isValidKey === void 0)
           isValidKey = null;
-        this[_comparator] = dart.as(compare == null ? core.Comparable.compare : compare, core.Comparator$(K));
+        this[_comparator] = dart.as(compare == null ? dart.bind(core.Comparable, 'compare') : compare, core.Comparator$(K));
         this[_validKey] = dart.as(isValidKey != null ? isValidKey : v => dart.is(v, K), _Predicate);
         super._SplayTree();
       }
       from(other, compare, isValidKey) {
         if (compare === void 0)
           compare = null;
         if (isValidKey === void 0)
           isValidKey = null;
         let result = new (SplayTreeMap$(K, V))();
         other.forEach((k, v) => {
@@ skipping 351 matching lines @@
   });
   let _SplayTreeNodeIterator = _SplayTreeNodeIterator$();
   let _clone = Symbol('_clone');
   let SplayTreeSet$ = dart.generic(function(E) {
     class SplayTreeSet extends dart.mixin(_SplayTree$(E), IterableMixin$(E), SetMixin$(E)) {
       SplayTreeSet(compare, isValidKey) {
         if (compare === void 0)
           compare = null;
         if (isValidKey === void 0)
           isValidKey = null;
-        this[_comparator] = dart.as(compare == null ? core.Comparable.compare : compare, core.Comparator);
+        this[_comparator] = dart.as(compare == null ? dart.bind(core.Comparable, 'compare') : compare, core.Comparator);
         this[_validKey] = dart.as(isValidKey != null ? isValidKey : v => dart.is(v, E), _Predicate);
         super._SplayTree();
       }
       from(elements, compare, isValidKey) {
         if (compare === void 0)
           compare = null;
         if (isValidKey === void 0)
           isValidKey = null;
         let result = new (SplayTreeSet$(E))(compare, isValidKey);
         for (let element of dart.as(elements, core.Iterable$(E))) {
@@ skipping 1754 matching lines @@
   exports.LinkedHashMapKeyIterable$ = LinkedHashMapKeyIterable$;
   exports.LinkedHashMapKeyIterable = LinkedHashMapKeyIterable;
   exports.LinkedHashMapKeyIterator$ = LinkedHashMapKeyIterator$;
   exports.LinkedHashMapKeyIterator = LinkedHashMapKeyIterator;
   exports.HashSetIterator$ = HashSetIterator$;
   exports.HashSetIterator = HashSetIterator;
   exports.LinkedHashSetCell = LinkedHashSetCell;
   exports.LinkedHashSetIterator$ = LinkedHashSetIterator$;
   exports.LinkedHashSetIterator = LinkedHashSetIterator;
 })(collection || (collection = {}));