pkg/compiler: fix imports

pkg/compiler/lib/src/inferrer/closure_tracer.dart

 // Copyright (c) 2013, 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 compiler.src.inferrer.closure_tracer;
 
-import '../types/types.dart' show TypeMask;
 import '../common/names.dart' show Names;
 import '../elements/elements.dart';
+import '../types/types.dart' show TypeMask;
 import '../universe/selector.dart' show Selector;
+import 'debug.dart' as debug;
 import 'node_tracer.dart';
 import 'type_graph_nodes.dart';
-import 'debug.dart' as debug;
 
 class ClosureTracerVisitor extends TracerVisitor<ApplyableTypeInformation> {
   final Iterable<FunctionElement> tracedElements;
   final List<CallSiteTypeInformation> _callsToAnalyze =
       new List<CallSiteTypeInformation>();
 
   ClosureTracerVisitor(this.tracedElements, tracedType, inferrer)
       : super(tracedType, inferrer);
 
   void run() {
@@ skipping 101 matching lines @@
   @override
   visitStaticCallSiteTypeInformation(StaticCallSiteTypeInformation info) {
     super.visitStaticCallSiteTypeInformation(info);
     if (info.calledElement == tracedElements.first &&
         info.selector != null &&
         info.selector.isGetter) {
       addNewEscapeInformation(info);
     }
   }
 }