Move common identifiers, names and selectors to a separate library.

tests/compiler/dart2js/patch_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.
 
 import 'dart:async';
 import 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/compiler.dart';
 import 'package:compiler/src/diagnostics/messages.dart' show MessageKind;
 import 'package:compiler/src/elements/elements.dart';
@@ skipping 854 matching lines @@
     ensure(compiler, "method", cls.patch.lookupLocalMember,
            checkHasBody: true, expectIsRegular: true);
 
     ensure(compiler, "clear", cls.lookupLocalMember,
            checkHasBody: true, expectIsPatched: true);
 
     compiler.phase = Compiler.PHASE_DONE_RESOLVING;
 
     // Check that a method just in the patch class is a target for a
     // typed selector.
-    Selector selector = new Selector.call('method', compiler.coreLibrary, 0);
+    Selector selector = new Selector.call(const PublicName('method'), 0);
     TypeMask typeMask = new TypeMask.exact(cls, world);
     FunctionElement method = cls.implementation.lookupLocalMember('method');
     method.computeType(compiler);
     Expect.isTrue(selector.applies(method, world));
     Expect.isTrue(typeMask.canHit(method, selector, world));
 
     // Check that the declaration method in the declaration class is a target
     // for a typed selector.
-    selector = new Selector.call('clear', compiler.coreLibrary, 0);
+    selector = new Selector.call(const PublicName('clear'), 0);
     typeMask = new TypeMask.exact(cls, world);
     method = cls.lookupLocalMember('clear');
     method.computeType(compiler);
     Expect.isTrue(selector.applies(method, world));
     Expect.isTrue(typeMask.canHit(method, selector, world));
 
     // Check that the declaration method in the declaration class is a target
     // for a typed selector on a subclass.
     cls = ensure(compiler, "B", compiler.coreLibrary.find);
     cls.ensureResolved(compiler);
@@ skipping 124 matching lines @@
   testPatchNoSetter();
   testPatchNonFunction();
 
   testPatchAndSelector();
 
   testEffectiveTarget(); /// bug: ok
 
   testAnalyzeAllInjectedMembers();
   testTypecheckPatchedMembers();
 }