Revert of Replace all remaining Oddball checks with new function

test/cctest/heap/test-heap.cc

Index: test/cctest/heap/test-heap.cc
diff --git a/test/cctest/heap/test-heap.cc b/test/cctest/heap/test-heap.cc
index 8fbe9963b1e749bf44c0474f5985c58cf0464ca9..f3782273598bf45ff00da41754f64bbf90096d94 100644
--- a/test/cctest/heap/test-heap.cc
+++ b/test/cctest/heap/test-heap.cc
@@ -1403,8 +1403,7 @@
   // the loop breaks once the function is enqueued as a candidate.
   for (int i = 0; i < kAgingThreshold; i++) {
     heap::SimulateIncrementalMarking(CcTest::heap());
-    if (!function->next_function_link()->IsUndefined(CcTest::i_isolate()))
-      break;
+    if (!function->next_function_link()->IsUndefined()) break;
     CcTest::heap()->CollectAllGarbage();
   }
 
@@ -1683,7 +1682,7 @@
 int CountNativeContexts() {
   int count = 0;
   Object* object = CcTest::heap()->native_contexts_list();
-  while (!object->IsUndefined(CcTest::i_isolate())) {
+  while (!object->IsUndefined()) {
     count++;
     object = Context::cast(object)->next_context_link();
   }
@@ -1819,7 +1818,7 @@
   Heap* heap = isolate->heap();
   int count = 0;
   Handle<Object> object(heap->native_contexts_list(), isolate);
-  while (!object->IsUndefined(isolate)) {
+  while (!object->IsUndefined()) {
     count++;
     if (count == n) heap->CollectAllGarbage();
     object =
@@ -4664,7 +4663,7 @@
 static int AllocationSitesCount(Heap* heap) {
   int count = 0;
   for (Object* site = heap->allocation_sites_list();
-       !(site->IsUndefined(heap->isolate()));
+       !(site->IsUndefined());
        site = AllocationSite::cast(site)->weak_next()) {
     count++;
   }