pkg/compiler: fix imports

pkg/compiler/lib/src/closure.dart

Index: pkg/compiler/lib/src/closure.dart
diff --git a/pkg/compiler/lib/src/closure.dart b/pkg/compiler/lib/src/closure.dart
index 0cffc4097aeb42543b15d0835c69ae9d17c19cf6..ccc7fb44081bbbc207139bf14f34dd351e1c24fd 100644
--- a/pkg/compiler/lib/src/closure.dart
+++ b/pkg/compiler/lib/src/closure.dart
@@ -4,10 +4,10 @@
 
 library closureToClassMapper;
 
-import 'common.dart';
 import 'common/names.dart' show Identifiers;
 import 'common/resolution.dart' show ParsingContext, Resolution;
 import 'common/tasks.dart' show CompilerTask;
+import 'common.dart';
 import 'compiler.dart' show Compiler;
 import 'constants/expressions.dart';
 import 'dart_types.dart';
@@ -19,8 +19,8 @@ import 'js_backend/js_backend.dart' show JavaScriptBackend;
 import 'resolution/tree_elements.dart' show TreeElements;
 import 'tokens/token.dart' show Token;
 import 'tree/tree.dart';
-import 'util/util.dart';
 import 'universe/universe.dart' show Universe;
+import 'util/util.dart';
 
 class ClosureTask extends CompilerTask {
   Map<Node, ClosureClassMap> closureMappingCache;