Change libraries map to use Uri.

runtime/tests/vm/dart/isolate_mirror_local_test.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.
 //
 // Dart test program for checking implemention of MirrorSystem when
 // inspecting the current isolate.
 //
 // VMOptions=--enable_type_checks
 
 library isolate_mirror_local_test;
 
 import "package:expect/expect.dart";
 import 'dart:async';
 import 'dart:isolate';
 import 'dart:mirrors';
+import 'dart:uri';
 
 ReceivePort exit_port;
 Set expectedTests;
 
 void testDone(String test) {
   if (!expectedTests.contains(test)) {
     throw "Unexpected test name '$test'";
   }
   expectedTests.remove(test);
   if (expectedTests.isEmpty) {
@@ skipping 267 matching lines @@
 
   // Test function type mirrors.
   var func_cls_mirror = typedef_mirror.referent;
   Expect.isTrue(func_cls_mirror is FunctionTypeMirror);
   // Expect.equals('void (dart.core.String)', func_cls_mirror.simpleName);
   Expect.equals(const Symbol('void'), func_cls_mirror.returnType.simpleName);
 }
 
 void testLibrariesMap(Map libraries) {
   // Just look for a couple of well-known libs.
-  LibraryMirror core_lib = libraries[const Symbol('dart.core')];
+  LibraryMirror core_lib = libraries[Uri.parse('dart:core')];
   Expect.isTrue(core_lib is LibraryMirror);
 
-  LibraryMirror mirror_lib = libraries[const Symbol('dart.mirrors')];
+  LibraryMirror mirror_lib = libraries[Uri.parse('dart:mirrors')];
   Expect.isTrue(mirror_lib is LibraryMirror);
 
   // Lookup an interface from a library and make sure it is sane.
   ClassMirror list_intf = core_lib.members[const Symbol('List')];
   Expect.isTrue(list_intf is ClassMirror);
   Expect.equals(const Symbol('List'), list_intf.simpleName);
   Expect.equals(const Symbol('dart.core.List'), list_intf.qualifiedName);
   Expect.isFalse(list_intf.isPrivate);
   Expect.equals(const Symbol('Object'), list_intf.superclass.simpleName);
   Expect.equals(const Symbol('dart.core'), list_intf.owner.simpleName);
@@ skipping 218 matching lines @@
   // Test that an isolate can reflect on itself.
   mirrorSystemOf(exit_port.toSendPort()).then(testMirrorSystem);
 
   testIntegerInstanceMirror(reflect(1001));
   testStringInstanceMirror(reflect('This\nis\na\nString'));
   testBoolInstanceMirror(reflect(true));
   testNullInstanceMirror(reflect(null));
   testCustomInstanceMirror(reflect(new MyClass(17)));
   testMirrorErrors(currentMirrorSystem());
 }