pkg/compiler: fix imports

pkg/compiler/lib/src/inferrer/map_tracer.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 compiler.src.inferrer.map_tracer;
 
 import '../elements/elements.dart';
 import '../universe/selector.dart' show Selector;
-
 import 'node_tracer.dart';
 import 'type_graph_nodes.dart';
 
 Set<String> okMapSelectorsSet = new Set.from(const <String>[
   // From Object.
   "==",
   "hashCode",
   "toString",
   "noSuchMethod",
   "runtimeType",
@@ skipping 100 matching lines @@
           return;
         }
       }
     } else if (selector.isCall &&
         !info.targets.every((element) => element.isFunction)) {
       bailout('Passed to a closure');
       return;
     }
   }
 }