Use entities in runtime_types

pkg/compiler/lib/src/ssa/optimize.dart

 // Copyright (c) 2012, 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.
 
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/names.dart' show Selectors;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart' show Compiler;
 import '../constants/constant_system.dart';
 import '../constants/values.dart';
 import '../common_elements.dart' show CommonElements;
 import '../elements/elements.dart'
     show ClassElement, FieldElement, MethodElement;
 import '../elements/entities.dart';
 import '../elements/resolution_types.dart';
 import '../js/js.dart' as js;
-import '../js_backend/js_backend.dart';
+import '../js_backend/backend.dart';
 import '../js_backend/native_data.dart' show NativeData;
+import '../js_backend/runtime_types.dart';
 import '../native/native.dart' as native;
 import '../options.dart';
 import '../types/types.dart';
 import '../universe/selector.dart' show Selector;
 import '../universe/side_effects.dart' show SideEffects;
 import '../util/util.dart';
 import '../world.dart' show ClosedWorld;
 import 'interceptor_simplifier.dart';
 import 'nodes.dart';
 import 'types.dart';
@@ skipping 2957 matching lines @@
 
     keyedValues.forEach((receiver, values) {
       result.keyedValues[receiver] =
           new Map<HInstruction, HInstruction>.from(values);
     });
 
     result.nonEscapingReceivers.addAll(nonEscapingReceivers);
     return result;
   }
 }