Object::GetElements() and friends maybehandlification.

test/cctest/test-object-observe.cc

Index: test/cctest/test-object-observe.cc
diff --git a/test/cctest/test-object-observe.cc b/test/cctest/test-object-observe.cc
index 6bde5b37e12d29c7132d36b1bbde473f4b97ae15..188d222191df1ea3a7b31eb25b13d9fc6905cc4b 100644
--- a/test/cctest/test-object-observe.cc
+++ b/test/cctest/test-object-observe.cc
@@ -412,13 +412,15 @@ TEST(ObservationWeakMap) {
       i_isolate->factory()->observation_state();
   i::Handle<i::JSWeakMap> callbackInfoMap =
       i::Handle<i::JSWeakMap>::cast(
-          i::GetProperty(observation_state, "callbackInfoMap"));
+          i::GetProperty(
+              observation_state, "callbackInfoMap").ToHandleChecked());
   i::Handle<i::JSWeakMap> objectInfoMap =
       i::Handle<i::JSWeakMap>::cast(
-          i::GetProperty(observation_state, "objectInfoMap"));
+          i::GetProperty(observation_state, "objectInfoMap").ToHandleChecked());
   i::Handle<i::JSWeakMap> notifierObjectInfoMap =
       i::Handle<i::JSWeakMap>::cast(
-          i::GetProperty(observation_state, "notifierObjectInfoMap"));
+          i::GetProperty(
+              observation_state, "notifierObjectInfoMap").ToHandleChecked());
   CHECK_EQ(1, NumberOfElements(callbackInfoMap));
   CHECK_EQ(1, NumberOfElements(objectInfoMap));
   CHECK_EQ(1, NumberOfElements(notifierObjectInfoMap));