Make the universe parts into small libraries.

pkg/compiler/lib/src/resolution/members.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.
 
 library dart2js.resolution.members;
 
 import '../common/names.dart' show
     Selectors;
 import '../compiler.dart' show
     Compiler;
@@ skipping 20 matching lines @@
     LocalVariableElementX,
     MethodElementX,
     ParameterElementX,
     VariableElementX,
     VariableList;
 import '../tokens/token.dart' show
     isUserDefinableOperator;
 import '../tree/tree.dart';
 import '../util/util.dart' show
     Link;
+import '../universe/call_structure.dart' show
+    CallStructure;
+import '../universe/selector.dart' show
+    Selector;
 import '../universe/universe.dart' show
-    CallStructure,
-    Selector,
     UniverseSelector;
 
 import 'access_semantics.dart';
 import 'class_members.dart' show MembersCreator;
 import 'operators.dart';
 import 'send_structure.dart';
 
 import 'constructors.dart' show
     ConstructorResolver,
     ConstructorResult;
@@ skipping 4610 matching lines @@
     }
     return const NoneResult();
   }
 }
 
 /// Looks up [name] in [scope] and unwraps the result.
 Element lookupInScope(Compiler compiler, Node node,
                       Scope scope, String name) {
   return Elements.unwrap(scope.lookup(name), compiler, node);
 }