fix Library*NegativeTests (and a couple Prefix ones by accident)

frog/value.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
 /**
  * Represents a meta-value for code generation.
  */
 class Value {
   Type _type;
 
   /** The javascript code to generate this value. */
@@ skipping 971 matching lines @@
 
 class MapValue extends EvaluatedValue {
   List<Value> values;
 
   MapValue(this.values, bool isConst, Type type, SourceSpan span):
     super(isConst, type, span);
 
   String get code() {
     // Cache?
     var items = new ListValue(values, false, world.listType, span);
-    var tp = world.corelib.topType;
+    var tp = world.coreimpl.topType;
     Member f = isConst ? tp.getMember('_constMap') : tp.getMember('_map');
     // TODO(jimhug): Clean up invoke signature
     var value = f.invoke(null, null, new Value.type(tp, null),
       new Arguments(null, [items]));
     return value.code;
   }
 
   GlobalValue getGlobalValue() {
     assert(isConst);
 
@@ skipping 221 matching lines @@
     }
 
     _ensureCode();
     return null;
   }
 }
 
 String _escapeForComment(String text) {
   return text.replaceAll('/*', '/ *').replaceAll('*/', '* /');
 }