Implement simple dynamic type check.

lib/compiler/implementation/universe.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.
 
 class Universe {
   Map<Element, String> generatedCode;
   Map<Element, String> generatedBailoutCode;
   final Set<ClassElement> instantiatedClasses;
   final Set<SourceString> instantiatedClassInstanceFields;
   final Set<FunctionElement> staticFunctionsNeedingGetter;
   final Map<SourceString, Set<Selector>> invokedNames;
   final Map<SourceString, Set<Selector>> invokedGetters;
   final Map<SourceString, Set<Selector>> invokedSetters;
   final Map<String, LibraryElement> libraries;
   // TODO(ngeoffray): This should be a Set<Type>.
   final Set<Element> isChecks;
+  final RuntimeTypeInformation rti;
 
   Universe() : generatedCode = new Map<Element, String>(),
                generatedBailoutCode = new Map<Element, String>(),
                libraries = new Map<String, LibraryElement>(),
                instantiatedClasses = new Set<ClassElement>(),
                instantiatedClassInstanceFields = new Set<SourceString>(),
                staticFunctionsNeedingGetter = new Set<FunctionElement>(),
                invokedNames = new Map<SourceString, Set<Selector>>(),
                invokedGetters = new Map<SourceString, Set<Selector>>(),
                invokedSetters = new Map<SourceString, Set<Selector>>(),
-               isChecks = new Set<Element>();
+               isChecks = new Set<Element>(),
+               rti = new RuntimeTypeInformation();
 
   void addGeneratedCode(WorkItem work, String code) {
     generatedCode[work.element] = code;
   }
 
   void addBailoutCode(WorkItem work, String code) {
     generatedBailoutCode[work.element] = code;
   }
 
   bool hasMatchingSelector(Set<Selector> selectors,
@@ skipping 288 matching lines @@
 
     return false;
   }
 
   bool operator ==(other) {
     if (other is !TypedSelector) return false;
     if (other.receiverType !== receiverType) return false;
     return super == other;
   }
 }