Make the universe parts into small libraries.

pkg/compiler/lib/src/universe/function_set.dart

Index: pkg/compiler/lib/src/universe/function_set.dart
diff --git a/pkg/compiler/lib/src/universe/function_set.dart b/pkg/compiler/lib/src/universe/function_set.dart
index 5f8dedd36783087462b216921ff5359afc8b719a..72a1813e91bc2fd22f13b005e1e6fb6901329c06 100644
--- a/pkg/compiler/lib/src/universe/function_set.dart
+++ b/pkg/compiler/lib/src/universe/function_set.dart
@@ -2,7 +2,23 @@
 // 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.
 
-part of universe;
+library universe.function_set;
+
+import '../common/names.dart' show
+    Identifiers,
+    Selectors;
+import '../compiler.dart' show
+    Compiler;
+import '../elements/elements.dart';
+import '../types/types.dart';
+import '../util/util.dart' show
+    Hashing,
+    Setlet;
+import '../world.dart' show
+    ClassWorld;
+
+import 'selector.dart' show
+    Selector;
 
 // TODO(kasperl): This actually holds getters and setters just fine
 // too and stricly they aren't functions. Maybe this needs a better