Reverting 3174. Aka reapplying 3150, 3151 and 3159. Aka api accessor

src/codegen.cc

 // Copyright 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 534 matching lines @@
 
 void ArgumentsAccessStub::Generate(MacroAssembler* masm) {
   switch (type_) {
     case READ_LENGTH: GenerateReadLength(masm); break;
     case READ_ELEMENT: GenerateReadElement(masm); break;
     case NEW_OBJECT: GenerateNewObject(masm); break;
   }
 }
 
 
+bool ApiGetterEntryStub::GetCustomCache(Code** code_out) {
+  Object* cache = info()->load_stub_cache();
+  if (cache->IsUndefined()) {
+    return false;
+  } else {
+    *code_out = Code::cast(cache);
+    return true;
+  }
+}
+
+
+void ApiGetterEntryStub::SetCustomCache(Code* value) {
+  info()->set_load_stub_cache(value);
+}
+
+
 } }  // namespace v8::internal