Replace HCheckPrototypeMaps by explicit map checks of constant values.

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3659 matching lines @@
 void Map::NotifyLeafMapLayoutChange() {
   if (is_stable()) {
     mark_unstable();
     dependent_code()->DeoptimizeDependentCodeGroup(
         GetIsolate(),
         DependentCode::kPrototypeCheckGroup);
   }
 }
 
 
-bool Map::CanOmitPrototypeChecks() {
-  return is_stable() && FLAG_omit_prototype_checks_for_leaf_maps;
-}
-
-
 bool Map::CanOmitMapChecks() {
   return is_stable() && FLAG_omit_map_checks_for_leaf_maps;
 }
 
 
 int DependentCode::number_of_entries(DependencyGroup group) {
   if (length() == 0) return 0;
   return Smi::cast(get(group))->value();
 }
 
@@ skipping 2542 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_