pkg/compiler: fix imports

pkg/compiler/lib/src/cps_ir/cps_fragment.dart

 // Copyright (c) 2015, 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 cps_ir.cps_fragment;
 
+import '../constants/values.dart';
+import '../elements/elements.dart';
+import '../io/source_information.dart';
+import '../types/types.dart' show TypeMask;
+import '../universe/selector.dart' show Selector;
 import 'cps_ir_nodes.dart';
-import '../constants/values.dart';
-import '../universe/selector.dart' show Selector;
-import '../types/types.dart' show TypeMask;
-import '../io/source_information.dart';
-import '../elements/elements.dart';
 
 /// Builds a CPS fragment that can be plugged into another CPS term.
 ///
 /// A CPS fragment contains a CPS term, possibly with a "hole" in it denoting
 /// where to insert new IR nodes. We say a fragment is "open" if it has such
 /// a hole. Otherwise, the fragment is "closed" and cannot be extended further.
 ///
 /// This class is designed for building non-trivial CPS terms in a readable and
 /// non-error prone manner. It is not designed to manipulate existing IR nodes,
 /// nor is it intended to shield the user from every complexity in the IR.
@@ skipping 342 matching lines @@
   while (prim.firstRef != null) {
     Refinement refine = prim.firstRef.parent;
     destroyRefinementsOfDeadPrimitive(refine);
     LetPrim letPrim = refine.parent;
     InteriorNode parent = letPrim.parent;
     parent.body = letPrim.body;
     letPrim.body.parent = parent;
     prim.firstRef.unlink();
   }
 }