remove uses of static oddball accessors using GetCurrent in advance of removal from api

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 0c8e1cd18c632553011ff5a76914f9aa9eb14fe1..bf1029586a56bd28749f77693ac6b7ecbec5d407 100644
--- a/test/cctest/test-object-observe.cc
+++ b/test/cctest/test-object-observe.cc
@@ -394,7 +394,7 @@ TEST(HiddenPrototypeObservation) {
     { obj, "updated", "foo", Number::New(75) }
   };
   EXPECT_RECORDS(CompileRun("records"), expected_records);
-  obj->SetPrototype(Null());
+  obj->SetPrototype(Null(isolate.GetIsolate()));
   CompileRun("obj.foo = 43");
   const RecordExpectation expected_records2[] = {
     { obj, "new", "foo", Handle<Value>() }