bulk replace Isolate::Current in tests

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 b129ff3af4ceb2e2fa4f78b0e60ce7f3765180aa..76d05db0912094b83f9279504764eb813ad9097e 100644
--- a/test/cctest/test-object-observe.cc
+++ b/test/cctest/test-object-observe.cc
@@ -429,8 +429,9 @@ TEST(ObservationWeakMap) {
       "Object.observe(obj, function(){});"
       "Object.getNotifier(obj);"
       "obj = null;");
+  i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate.GetIsolate());
   i::Handle<i::JSObject> observation_state =
-      i::Isolate::Current()->factory()->observation_state();
+      i_isolate->factory()->observation_state();
   i::Handle<i::JSWeakMap> callbackInfoMap =
       i::Handle<i::JSWeakMap>::cast(
           i::GetProperty(observation_state, "callbackInfoMap"));