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

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index 82f8f6df77677c5735bf614e64cd27473e9fd9bd..97a98017c5897e6bedb38d6d54ac751acf04bd89 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-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:
@@ -889,24 +889,13 @@ class MacroAssembler: public Assembler {
                                    XMMRegister xmm_scratch,
                                    Label* fail);
 
-  // Compare an object's map with the specified map and its transitioned
-  // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. FLAGS are set with
-  // result of map compare. If multiple map compares are required, the compare
-  // sequences branches to early_success.
-  void CompareMap(Register obj,
-                  Handle<Map> map,
-                  Label* early_success,
-                  CompareMapMode mode = REQUIRE_EXACT_MAP);
-
-  // Check if the map of an object is equal to a specified map and branch to
-  // label if not. Skip the smi check if not required (object is known to be a
-  // heap object). If mode is ALLOW_ELEMENT_TRANSITION_MAPS, then also match
-  // against maps that are ElementsKind transition maps of the specificed map.
+  // Check if the map of an object is equal to a specified map and
+  // branch to label if not. Skip the smi check if not required
+  // (object is known to be a heap object)
   void CheckMap(Register obj,
                 Handle<Map> map,
                 Label* fail,
-                SmiCheckType smi_check_type,
-                CompareMapMode mode = REQUIRE_EXACT_MAP);
+                SmiCheckType smi_check_type);
 
   // Check if the map of an object is equal to a specified map and branch to a
   // specified target if equal. Skip the smi check if not required (object is