SDK fixes

test/generated_sdk/lib/convert/convert.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.
 
 /**
  *
  * Encoders and decoders for converting between different data representations,
  * including JSON and UTF-8.
  *
  * In addition to converters for common data representations, this library
@@ skipping 149 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 164 matching lines @@
   void close() {
     super.close();
     StringBuffer buffer = _stringSink;
     String accumulated = buffer.toString();
     buffer.clear();
     Object decoded = _parseJson(accumulated, _reviver);
     _sink.add(decoded);
     _sink.close();
   }
 }