Cleanup FooSpace::VerifyObject and ElementsAccessor::Validate.

src/elements.cc

Index: src/elements.cc
diff --git a/src/elements.cc b/src/elements.cc
index 77abf4e42b871b848f91a6cbe00df15545b42252..5cef12bbd216df2db3e6192607a69e5ff1efd332 100644
--- a/src/elements.cc
+++ b/src/elements.cc
@@ -581,14 +581,8 @@ class ElementsAccessorBase : public ElementsAccessor {
     // When objects are first allocated, its elements are Failures.
     if (fixed_array_base->IsFailure()) return;
     if (!fixed_array_base->IsHeapObject()) return;
-    Map* map = fixed_array_base->map();
     // Arrays that have been shifted in place can't be verified.
-    Heap* heap = holder->GetHeap();
-    if (map == heap->one_pointer_filler_map() ||
-        map == heap->two_pointer_filler_map() ||
-        map == heap->free_space_map()) {
-      return;
-    }
+    if (fixed_array_base->IsFiller()) return;
     int length = 0;
     if (holder->IsJSArray()) {
       Object* length_obj = JSArray::cast(holder)->length();