Object::GetElements() and friends maybehandlification.

test/cctest/test-object-observe.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 394 matching lines @@
   CompileRun(
       "var obj = {};"
       "Object.observe(obj, function(){});"
       "Object.getNotifier(obj);"
       "obj = null;");
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(CcTest::isolate());
   i::Handle<i::JSObject> observation_state =
       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));
   i_isolate->heap()->CollectAllGarbage(i::Heap::kAbortIncrementalMarkingMask);
   CHECK_EQ(0, NumberOfElements(callbackInfoMap));
   CHECK_EQ(0, NumberOfElements(objectInfoMap));
   CHECK_EQ(0, NumberOfElements(notifierObjectInfoMap));
 }
 
 
@@ skipping 287 matching lines @@
              "var observer = function(r) { records = r };"
              "Object.observe(obj, observer);");
   Handle<Value> obj =
       context->Global()->Get(String::NewFromUtf8(CcTest::isolate(), "obj"));
   Handle<Object>::Cast(obj)
       ->SetHiddenValue(String::NewFromUtf8(CcTest::isolate(), "foo"),
                        Null(CcTest::isolate()));
   CompileRun("");  // trigger delivery
   CHECK(CompileRun("records")->IsNull());
 }