Move functions from handles.cc to where they belong.

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 188d222191df1ea3a7b31eb25b13d9fc6905cc4b..a8cbaf6ea75a49902e63bd75607fdc8860c62ca2 100644
--- a/test/cctest/test-object-observe.cc
+++ b/test/cctest/test-object-observe.cc
@@ -407,20 +407,19 @@ TEST(ObservationWeakMap) {
       "Object.observe(obj, function(){});"
       "Object.getNotifier(obj);"
       "obj = null;");
-  i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(CcTest::isolate());
+  i::Isolate* i_isolate = CcTest::i_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").ToHandleChecked());
+      i::Handle<i::JSWeakMap>::cast(i::Object::GetProperty(
+          i_isolate, observation_state, "callbackInfoMap").ToHandleChecked());
   i::Handle<i::JSWeakMap> objectInfoMap =
-      i::Handle<i::JSWeakMap>::cast(
-          i::GetProperty(observation_state, "objectInfoMap").ToHandleChecked());
+      i::Handle<i::JSWeakMap>::cast(i::Object::GetProperty(
+          i_isolate, observation_state, "objectInfoMap").ToHandleChecked());
   i::Handle<i::JSWeakMap> notifierObjectInfoMap =
-      i::Handle<i::JSWeakMap>::cast(
-          i::GetProperty(
-              observation_state, "notifierObjectInfoMap").ToHandleChecked());
+      i::Handle<i::JSWeakMap>::cast(i::Object::GetProperty(
+          i_isolate, observation_state, "notifierObjectInfoMap")
+              .ToHandleChecked());
   CHECK_EQ(1, NumberOfElements(callbackInfoMap));
   CHECK_EQ(1, NumberOfElements(objectInfoMap));
   CHECK_EQ(1, NumberOfElements(notifierObjectInfoMap));