Revert of Replace all remaining Oddball checks with new function

src/elements.cc

Index: src/elements.cc
diff --git a/src/elements.cc b/src/elements.cc
index d7e49cdcb9350b6f17c28882fc6c0aa6f57d12b4..ed88b01b8bf7baf764dd1d20aa6af0bfc10dceb0 100644
--- a/src/elements.cc
+++ b/src/elements.cc
@@ -450,13 +450,11 @@
     WriteBarrierMode write_barrier_mode = UPDATE_WRITE_BARRIER) {
   struct {
     bool operator()(Object* a, Object* b) {
-      if (a->IsSmi() || !a->IsUndefined(HeapObject::cast(a)->GetIsolate())) {
-        if (!b->IsSmi() && b->IsUndefined(HeapObject::cast(b)->GetIsolate())) {
-          return true;
-        }
+      if (!a->IsUndefined()) {
+        if (b->IsUndefined()) return true;
         return a->Number() < b->Number();
       }
-      return !b->IsSmi() && b->IsUndefined(HeapObject::cast(b)->GetIsolate());
+      return b->IsUndefined();
     }
   } cmp;
   Object** start =
@@ -1176,7 +1174,7 @@
     uint32_t index = GetIndexForEntryImpl(*dict, entry);
     Handle<Object> result = SeededNumberDictionary::DeleteProperty(dict, entry);
     USE(result);
-    DCHECK(result->IsTrue(dict->GetIsolate()));
+    DCHECK(result->IsTrue());
     Handle<FixedArray> new_elements =
         SeededNumberDictionary::Shrink(dict, index);
     obj->set_elements(*new_elements);
@@ -2447,7 +2445,7 @@
     uint32_t index = GetIndexForEntryImpl(*dict, entry);
     Handle<Object> result = SeededNumberDictionary::DeleteProperty(dict, entry);
     USE(result);
-    DCHECK(result->IsTrue(dict->GetIsolate()));
+    DCHECK(result->IsTrue());
     Handle<FixedArray> new_elements =
         SeededNumberDictionary::Shrink(dict, index);
     parameter_map->set(1, *new_elements);