Revert r5147 due to failing assert, with no simple solution. Issue 808.

src/objects-inl.h

Index: src/objects-inl.h
===================================================================
--- src/objects-inl.h	(revision 5166)
+++ src/objects-inl.h	(working copy)
@@ -574,18 +574,6 @@
 }
 
 
-bool Object::IsNormalizedMapCache() {
-  if (!IsFixedArray()) return false;
-  if (FixedArray::cast(this)->length() != NormalizedMapCache::kEntries) {
-    return false;
-  }
-#ifdef DEBUG
-  reinterpret_cast<NormalizedMapCache*>(this)->NormalizedMapCacheVerify();
-#endif
-  return true;
-}
-
-
 bool Object::IsCompilationCacheTable() {
   return IsHashTable();
 }
@@ -1639,7 +1627,6 @@
 CAST_ACCESSOR(DescriptorArray)
 CAST_ACCESSOR(SymbolTable)
 CAST_ACCESSOR(JSFunctionResultCache)
-CAST_ACCESSOR(NormalizedMapCache)
 CAST_ACCESSOR(CompilationCacheTable)
 CAST_ACCESSOR(CodeCacheHashTable)
 CAST_ACCESSOR(MapCache)