Support runtime check of function types.

sdk/lib/_internal/compiler/implementation/compile_time_constants.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.
 
 part of dart2js;
 
 /**
  * The [ConstantHandler] keeps track of compile-time constants,
  * initializations of global and static fields, and default values of
  * optional parameters.
@@ skipping 45 matching lines @@
       registerInstantiatedType(interceptor.dispatchedType, elements);
     }
     compiledConstants.add(constant);
   }
 
   void registerInstantiatedType(DartType type, TreeElements elements) {
     if (isMetadata) return;
     compiler.enqueuer.codegen.registerInstantiatedType(type, elements);
     if (type is InterfaceType &&
         !type.isRaw &&
-        compiler.backend.needsRti(type.element)) {
+        compiler.backend.classNeedsRti(type.element)) {
       registerSetRuntimeTypeInfoFunction();
     }
   }
 
   void registerStaticUse(Element element) {
     if (isMetadata) return;
     compiler.analyzeElement(element.declaration);
     compiler.enqueuer.codegen.registerStaticUse(element);
   }
 
@@ skipping 831 matching lines @@
           if (fieldValue == null) {
             // Use the default value.
             fieldValue = handler.compileConstant(field);
           }
           jsNewArguments.add(fieldValue);
         },
         includeSuperAndInjectedMembers: true);
     return jsNewArguments;
   }
 }