Make the universe parts into small libraries.

pkg/compiler/lib/src/common/names.dart

 // Copyright (c) 2015, 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.
 
 /// Library containing identifier, names, and selectors commonly used through
 /// the compiler.
 library dart2js.common.names;
 
 import '../elements/elements.dart' show
     Name,
     PublicName;
-import '../universe/universe.dart' show
-    CallStructure,
+import '../universe/call_structure.dart' show
+    CallStructure;
+import '../universe/selector.dart' show
     Selector;
 
 /// [String]s commonly used.
 class Identifiers {
   /// The name of the call operator.
   static const String call = 'call';
 
   /// The name of the current element property used on iterators in for-each
   /// loops.
   static const String current = 'current';
@@ skipping 31 matching lines @@
   static const Name iterator = const PublicName(Identifiers.iterator);
 
   /// The name of the move next method used on iterators in for-each loops.
   static const Name moveNext = const PublicName('moveNext');
 
   /// The name of the no such method handler on 'Object'.
   static const Name noSuchMethod_ = const PublicName(Identifiers.noSuchMethod_);
 
   /// The name of the to-string method on 'Object'.
   static const Name toString_ = const PublicName('toString');
+
+  static const Name INDEX_NAME = const PublicName("[]");
+  static const Name INDEX_SET_NAME = const PublicName("[]=");
+  static const Name CALL_NAME = Names.call;
 }
 
 /// [Selector]s commonly used.
 class Selectors {
   /// The selector for calling the cancel method on 'StreamIterator'.
   static final Selector cancel =
       new Selector.call(const PublicName('cancel'), CallStructure.NO_ARGS);
 
   /// The selector for getting the current element property used in for-each
   /// loops.
@@ skipping 37 matching lines @@
   /// The URI for 'dart:mirrors'.
   static final Uri dart_mirrors = new Uri(scheme: 'dart', path: 'mirrors');
 
   /// The URI for 'dart:_internal'.
   static final Uri dart__internal = new Uri(scheme: 'dart', path: '_internal');
 
   /// The URI for 'dart:_native_typed_data'.
   static final Uri dart__native_typed_data =
       new Uri(scheme: 'dart', path: '_native_typed_data');
 }