Make the universe parts into small libraries.

pkg/compiler/lib/src/resolution/registry.dart

 // Copyright (c) 2014, 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 dart2js.resolution.registry;
 
 import '../common/backend_api.dart' show
     Backend;
 import '../common/registry.dart' show
     Registry;
 import '../compiler.dart' show
     Compiler;
 import '../constants/expressions.dart';
 import '../dart_types.dart';
 import '../diagnostics/invariant.dart' show
     invariant;
 import '../enqueue.dart' show
     ResolutionEnqueuer,
     WorldImpact;
 import '../elements/elements.dart';
 import '../tree/tree.dart';
 import '../util/util.dart' show
     Setlet;
+import '../universe/selector.dart' show
+    Selector;
 import '../universe/universe.dart' show
-    CallStructure,
-    Selector,
-    SelectorKind,
     UniverseSelector;
 import '../world.dart' show World;
 
 import 'send_structure.dart';
 
 import 'members.dart' show
     ResolverVisitor;
 import 'tree_elements.dart' show
     TreeElementMapping;
 
@@ skipping 573 matching lines @@
   }
 
   void registerIncDecOperation() {
     backend.resolutionCallbacks.onIncDecOperation(this);
   }
 
   void registerTryStatement() {
     mapping.containsTryStatement = true;
   }
 }