Remove last references to NeanderObject

All uses of NeanderObject have been replaced by FixedArrays.

BUG=

Review-Url: https://codereview.chromium.org/2447123002
Cr-Commit-Position: refs/heads/master@{#40575}

src/factory.h

@@ -430,12 +430,6 @@ class V8_EXPORT_PRIVATE Factory final {
   SIMD128_TYPES(SIMD128_NEW_DECL)
 #undef SIMD128_NEW_DECL
 
-  // These objects are used by the api to create env-independent data
-  // structures in the heap.
-  inline Handle<JSObject> NewNeanderObject() {
-    return NewJSObjectFromMap(neander_map());
-  }
-
   Handle<JSWeakMap> NewJSWeakMap();
 
   Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length);

src/heap/heap.cc

@@ -2538,16 +2538,6 @@ AllocationResult Heap::AllocateTransitionArray(int capacity) {
 
 void Heap::CreateApiObjects() {
   HandleScope scope(isolate());
-  Factory* factory = isolate()->factory();
-  Handle<Map> new_neander_map =
-      factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
-
-  // Don't use Smi-only elements optimizations for objects with the neander
-  // map. There are too many cases where element values are set directly with a
-  // bottleneck to trap the Smi-only -> fast elements transition, and there
-  // appears to be no benefit for optimize this case.
-  new_neander_map->set_elements_kind(TERMINAL_FAST_ELEMENTS_KIND);
-  set_neander_map(*new_neander_map);
   set_message_listeners(*TemplateList::New(isolate(), 2));
 }
 

src/heap/heap.h

@@ -91,7 +91,6 @@ using v8::MemoryPressureLevel;
   V(Map, unseeded_number_dictionary_map, UnseededNumberDictionaryMap)          \
   V(Map, sloppy_arguments_elements_map, SloppyArgumentsElementsMap)            \
   V(Map, message_object_map, JSMessageObjectMap)                               \
-  V(Map, neander_map, NeanderMap)                                              \
   V(Map, external_map, ExternalMap)                                            \
   V(Map, bytecode_array_map, BytecodeArrayMap)                                 \
   /* String maps */                                                            \
@@ -306,7 +305,6 @@ using v8::MemoryPressureLevel;
   V(ArgumentsMarkerMap)                 \
   V(JSMessageObjectMap)                 \
   V(ForeignMap)                         \
-  V(NeanderMap)                         \
   V(NanValue)                           \
   V(InfinityValue)                      \
   V(MinusZeroValue)                     \