Don't leak contexts in Object.observe

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 0d700deb009dd83fd933ff28b8ceae5bf6ef776c..b15871539534cfc2b7b363f5a2f1bd01de6fd5a4 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1556,6 +1556,12 @@ void Genesis::InstallNativeFunctions() {
                  observers_begin_perform_splice);
   INSTALL_NATIVE(JSFunction, "EndPerformSplice",
                  observers_end_perform_splice);
+  INSTALL_NATIVE(JSFunction, "NativeObjectObserve",
+                 native_object_observe);
+  INSTALL_NATIVE(JSFunction, "NativeObjectGetNotifier",
+                 native_object_get_notifier);
+  INSTALL_NATIVE(JSFunction, "NativeObjectNotifierPerformChange",
+                 native_object_notifier_perform_change);
 }