cleans up sdk patching so we no longer have unresolved names

test/generated_sdk/lib/collection/collection.dart

 // Copyright (c) 2012, 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.
 
 /**
  * Classes and utilities that supplement the collection support in dart:core.
  */
 library dart.collection;
 
 import 'dart:_internal';
 import 'dart:math' show Random;  // Used by ListMixin.shuffle.
 
 part 'collections.dart';
 part 'hash_map.dart';
 part 'hash_set.dart';
 part 'iterable.dart';
 part 'iterator.dart';
 part 'linked_hash_map.dart';
 part 'linked_hash_set.dart';
 part 'linked_list.dart';
 part 'list.dart';
 part 'maps.dart';
 part 'queue.dart';
 part 'set.dart';
 part 'splay_tree.dart';
+import 'dart:_foreign_helper' show JS;
+import 'dart:_js_helper' show
+    fillLiteralMap, InternalMap, NoInline, NoThrows, patch;
 
 class _HashMap<K, V> implements HashMap<K, V> {
   int _length = 0;
 
   // The hash map contents are divided into three parts: one part for
   // string keys, one for numeric keys, and one for the rest. String
   // and numeric keys map directly to their values, but the rest of
   // the entries are stored in bucket lists of the form:
   //
   //    [key-0, value-0, key-1, value-1, ...]
@@ skipping 1633 matching lines @@
     } else if (_cell == null) {
       _current = null;
       return false;
     } else {
       _current = _cell._element;
       _cell = _cell._next;
       return true;
     }
   }
 }