Cleanup the core/object.dart file.

lib/compiler/implementation/enqueue.dart

Index: lib/compiler/implementation/enqueue.dart
diff --git a/lib/compiler/implementation/enqueue.dart b/lib/compiler/implementation/enqueue.dart
index d1449cd9a29ce3fbc7bff8068ff15a644acf6d80..72122b389384d58940b7b78f0c35f93fc8afa006 100644
--- a/lib/compiler/implementation/enqueue.dart
+++ b/lib/compiler/implementation/enqueue.dart
@@ -128,8 +128,8 @@ class Enqueuer {
 
     queue.add(new WorkItem(element, elements, itemCompilationContextCreator()));
 
-    // Enable runtime type support if we discover a method called runtimeType.
-    if (element.isFunction() && element.name == Compiler.RUNTIME_TYPE) {
+    // Enable runtime type support if we discover a getter called runtimeType.
+    if (element.isGetter() && element.name == Compiler.RUNTIME_TYPE) {
       compiler.enabledRuntimeType = true;
     }