SDK fixes

tool/input_sdk/patch/convert_patch.dart

 // Copyright (c) 2013, 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.
 
 // Patch file for dart:convert library.
 
 import 'dart:_js_helper' show patch;
 import 'dart:_foreign_helper' show JS;
 import 'dart:_interceptors' show JSExtendableArray;
 import 'dart:_internal' show MappedIterable, ListIterable;
@@ skipping 122 matching lines @@
   // We keep track of the map entries that we have already
   // processed by adding them to a separate JavaScript object.
   var _processed = _newJavaScriptObject();
 
   // If the data slot isn't null, it represents either the list
   // of keys (for non-upgraded JSON maps) or the upgraded map.
   var _data = null;
 
   _JsonMap(this._original);
 
-  operator[](key) {
+  operator[](Object key) {
     if (_isUpgraded) {
       return _upgradedMap[key];
     } else if (key is !String) {
       return null;
     } else {
       var result = _getProperty(_processed, key);
       if (_isUnprocessed(result)) result = _process(key);
       return result;
     }
   }
@@ skipping 29 matching lines @@
       _upgrade()[key] = value;
     }
   }
 
   void addAll(Map other) {
     other.forEach((key, value) {
       this[key] = value;
     });
   }
 
-  bool containsValue(value) {
+  bool containsValue(Object value) {
     if (_isUpgraded) return _upgradedMap.containsValue(value);
     List<String> keys = _computeKeys();
     for (int i = 0; i < keys.length; i++) {
       String key = keys[i];
       if (this[key] == value) return true;
     }
     return false;
   }
 
-  bool containsKey(key) {
+  bool containsKey(Object key) {
     if (_isUpgraded) return _upgradedMap.containsKey(key);
     if (key is !String) return false;
     return _hasProperty(_original, key);
   }
 
   putIfAbsent(key, ifAbsent()) {
     if (containsKey(key)) return this[key];
     var value = ifAbsent();
     this[key] = value;
     return value;
@@ skipping 180 matching lines @@
     _sink.close();
   }
 }
 
 @patch class Utf8Decoder {
   @patch
   Converter<List<int>,dynamic> fuse(Converter<String, dynamic> next) {
     return super.fuse(next);
   }
 }