Implement accessing lazily initialized static fields.

dart/sdk/lib/_internal/lib/js_mirrors.dart

Index: dart/sdk/lib/_internal/lib/js_mirrors.dart
diff --git a/dart/sdk/lib/_internal/lib/js_mirrors.dart b/dart/sdk/lib/_internal/lib/js_mirrors.dart
index 7b84eab5e1566961b80aefe6dd15fd45787c55b4..802ec36be2936060d4a50404c1e7d2077d9d2cde 100644
--- a/dart/sdk/lib/_internal/lib/js_mirrors.dart
+++ b/dart/sdk/lib/_internal/lib/js_mirrors.dart
@@ -633,7 +633,12 @@ class JsClassMirror extends JsTypeMirror with JsObjectMirror
       if (!JS('bool', '# in #', jsName, JS_CURRENT_ISOLATE())) {
         throw new RuntimeError('Cannot find "$jsName" in current isolate.');
       }
-      return reflect(JS('', '#[#]', JS_CURRENT_ISOLATE(), jsName));
+      if (JS('bool', '# in init.lazies', jsName)) {
+        String getterName = JS('String', 'init.lazies[#]', jsName);
+        return reflect(JS('', '#[#]()', JS_CURRENT_ISOLATE(), getterName));
+      } else {
+        return reflect(JS('', '#[#]', JS_CURRENT_ISOLATE(), jsName));
+      }
     }
     // TODO(ahe): What receiver to use?
     throw new NoSuchMethodError(this, n(fieldName), null, null);