Revert change 4401.

src/stub-cache.cc

 // Copyright 2006-2009 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 75 matching lines @@
     *secondary = *primary;
   }
 
   // Update primary cache.
   primary->key = name;
   primary->value = code;
   return code;
 }
 
 
-Object* StubCache::ComputeLoadNonexistent(String* name, JSObject* receiver) {
-  // The code stub for loading nonexistent properties can be reused
-  // for all names, so we use the empty_string as the name in the map
-  // code cache.
-  Code::Flags flags =
-      Code::ComputeMonomorphicFlags(Code::LOAD_IC, NONEXISTENT);
-  Object* code = receiver->map()->FindInCodeCache(Heap::empty_string(), flags);
-  if (code->IsUndefined()) {
-    LoadStubCompiler compiler;
-    code = compiler.CompileLoadNonexistent(receiver);
-    if (code->IsFailure()) return code;
-    PROFILE(CodeCreateEvent(Logger::LOAD_IC_TAG,
-                            Code::cast(code),
-                            Heap::empty_string()));
-    Object* result = receiver->map()->UpdateCodeCache(Heap::empty_string(),
-                                                      Code::cast(code));
-    if (result->IsFailure()) return result;
-  }
-  return Set(name, receiver->map(), Code::cast(code));
-}
-
-
 Object* StubCache::ComputeLoadField(String* name,
                                     JSObject* receiver,
                                     JSObject* holder,
                                     int field_index) {
   Code::Flags flags = Code::ComputeMonomorphicFlags(Code::LOAD_IC, FIELD);
   Object* code = receiver->map()->FindInCodeCache(name, flags);
   if (code->IsUndefined()) {
     LoadStubCompiler compiler;
     code = compiler.CompileLoadField(receiver, holder, field_index, name);
     if (code->IsFailure()) return code;
@@ skipping 1020 matching lines @@
   if (!result->IsFailure()) {
     Code* code = Code::cast(result);
     USE(code);
     PROFILE(CodeCreateEvent(Logger::STUB_TAG, code, "ConstructStub"));
   }
   return result;
 }
 
 
 } }  // namespace v8::internal