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

runtime/lib/object_patch.dart

Index: runtime/lib/object_patch.dart
===================================================================
--- runtime/lib/object_patch.dart	(revision 16582)
+++ runtime/lib/object_patch.dart	(working copy)
@@ -36,5 +36,13 @@
                          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";
 }