In unoptimized code use call for instanceof instead of inlined checks. This allows us to collect ty…

runtime/lib/object_patch.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.
 
 patch class Object {
 
   // Helpers used to implement hashCode. If a hashCode is used we remember it
   // using an Expando object. A new hashCode value is calculated using a Random
   // number generator.
   static Expando _hashCodeExp = new Expando("Object.hashCode");
@@ skipping 18 matching lines @@
                 Map<String, dynamic> namedArguments)
       native "Object_noSuchMethod";
 
   /* patch */ noSuchMethod(InvocationMirror invocation) {
     return _noSuchMethod(invocation.isMethod,
                          invocation.memberName,
                          invocation.positionalArguments,
                          invocation.namedArguments);
   }
 
+  // Call this function instead of inlining instanceof, thus collecting
+  // type feedback and reducing code size of unoptimized code.
+  _instanceOf(instantiator,
+              instantiator_type_arguments,
+              type,
+              bool negate)
+      native "Object_instanceOf";
+
   /* patch */ Type get runtimeType native "Object_runtimeType";
 }