Downwards closure inference

lib/runtime/dart/collection.js

Index: lib/runtime/dart/collection.js
diff --git a/lib/runtime/dart/collection.js b/lib/runtime/dart/collection.js
index 3b3b4094287a2e5c4e10965b5228598cd6bc2d2e..ec20b67bbe0e8ba7b56f79e0e2f4b51c9a4bb54f 100644
--- a/lib/runtime/dart/collection.js
+++ b/lib/runtime/dart/collection.js
@@ -1130,7 +1130,7 @@ var collection;
         this[_insertAfter](this[_previous], entry);
       }
       addAll(entries) {
-        entries.forEach(dart.closureWrap(((entry) => this[_insertAfter](this[_previous], dart.as(entry, E))).bind(this), "(E) → void"));
+        entries.forEach(dart.as(((entry) => this[_insertAfter](this[_previous], dart.as(entry, E))).bind(this), dart.throw_("Unimplemented type (E) → void")));
       }
       remove(entry) {
         if (!dart.equals(entry[_list], this))
@@ -3362,7 +3362,7 @@ var collection;
         return new HashMapKeyIterable(this);
       }
       get values() {
-        return new _internal.MappedIterable(this.keys, dart.closureWrap(((each) => this.get(each)).bind(this), "(K) → V"));
+        return new _internal.MappedIterable(this.keys, dart.as(((each) => this.get(each)).bind(this), dart.throw_("Unimplemented type (K) → V")));
       }
       containsKey(key) {
         if (_HashMap[_isStringKey](key)) {
@@ -3763,7 +3763,7 @@ var collection;
         return new LinkedHashMapKeyIterable(this);
       }
       get values() {
-        return new _internal.MappedIterable(this.keys, dart.closureWrap(((each) => this.get(each)).bind(this), "(K) → V"));
+        return new _internal.MappedIterable(this.keys, dart.as(((each) => this.get(each)).bind(this), dart.throw_("Unimplemented type (K) → V")));
       }
       containsKey(key) {
         if (_LinkedHashMap[_isStringKey](key)) {
@@ -3790,7 +3790,7 @@ var collection;
         return dart.notNull(this[_findBucketIndex](bucket, key)) >= 0;
       }
       containsValue(value) {
-        return this.keys.any(dart.closureWrap(((each) => dart.equals(this.get(each), value)).bind(this), "(K) → bool"));
+        return this.keys.any(dart.as(((each) => dart.equals(this.get(each), value)).bind(this), dart.throw_("Unimplemented type (K) → bool")));
       }
       addAll(other) {
         other.forEach(((key, value) => {