Rename Universe to WorldBuilder.

pkg/compiler/lib/src/js_backend/js_interop_analysis.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.
 
 /// Analysis to determine how to generate code for typed JavaScript interop.
 library compiler.src.js_backend.js_interop_analysis;
 
 import '../common.dart';
 import '../constants/values.dart'
     show ConstantValue, ConstructedConstantValue, StringConstantValue;
 import '../dart_types.dart' show DartType, DynamicType, FunctionType;
 import '../diagnostics/messages.dart' show MessageKind;
 import '../elements/elements.dart'
     show
         ClassElement,
         Element,
         FieldElement,
         FunctionElement,
         LibraryElement,
         ParameterElement,
         MetadataAnnotation;
 import '../js/js.dart' as jsAst;
 import '../js/js.dart' show js;
 import '../universe/selector.dart' show Selector;
-import '../universe/universe.dart' show SelectorConstraints;
+import '../universe/world_builder.dart' show SelectorConstraints;
 import 'backend_helpers.dart' show BackendHelpers;
 import 'js_backend.dart' show JavaScriptBackend;
 
 class JsInteropAnalysis {
   final JavaScriptBackend backend;
 
   /// The resolved [FieldElement] for `Js.name`.
   FieldElement nameField;
   bool enabledJsInterop = false;
 
@@ skipping 152 matching lines @@
   }
 
   FunctionType buildJsFunctionType() {
     // TODO(jacobr): consider using codegenWorld.isChecks to determine the
     // range of positional arguments that need to be supported by JavaScript
     // function types.
     return new FunctionType.synthesized(const DynamicType(), [],
         new List<DartType>.filled(16, const DynamicType()));
   }
 }