Rollback 10331: Make sure transitioned arrays efficiently call builtin Array functions

src/x64/lithium-codegen-x64.h

Index: src/x64/lithium-codegen-x64.h
diff --git a/src/x64/lithium-codegen-x64.h b/src/x64/lithium-codegen-x64.h
index 5cffb5a68ac3d57f5937f9338b0121bee7432b64..832942f1efcc50b7dbe4d8db315bf7ac4a2437a4 100644
--- a/src/x64/lithium-codegen-x64.h
+++ b/src/x64/lithium-codegen-x64.h
@@ -1,4 +1,4 @@
-// Copyright 2012 the V8 project authors. All rights reserved.
+// Copyright 2011 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:
@@ -102,10 +102,7 @@ class LCodeGen BASE_EMBEDDED {
   void DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
                                        Label* map_check);
 
-  void DoCheckMapCommon(Register reg, Handle<Map> map,
-                        CompareMapMode mode, LEnvironment* env);
-
-// Parallel move support.
+  // Parallel move support.
   void DoParallelMove(LParallelMove* move);
   void DoGap(LGap* instr);