Various cleanups in check elimination.

src/arm64/lithium-codegen-arm64.cc

Index: src/arm64/lithium-codegen-arm64.cc
diff --git a/src/arm64/lithium-codegen-arm64.cc b/src/arm64/lithium-codegen-arm64.cc
index 1e4754affc2d6e986c4b2845061618ff7ec6d017..76dd52ae4e4945879726a065144c408571f8ead6 100644
--- a/src/arm64/lithium-codegen-arm64.cc
+++ b/src/arm64/lithium-codegen-arm64.cc
@@ -2132,14 +2132,14 @@ void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
     __ Bind(deferred->check_maps());
   }
 
-  const UniqueSet<Map>* map_set = instr->hydrogen()->map_set();
+  const UniqueSet<Map>* maps = instr->hydrogen()->maps();
   Label success;
-  for (int i = 0; i < map_set->size() - 1; i++) {
-    Handle<Map> map = map_set->at(i).handle();
+  for (int i = 0; i < maps->size() - 1; i++) {
+    Handle<Map> map = maps->at(i).handle();
     __ CompareMap(map_reg, map);
     __ B(eq, &success);
   }
-  Handle<Map> map = map_set->at(map_set->size() - 1).handle();
+  Handle<Map> map = maps->at(maps->size() - 1).handle();
   __ CompareMap(map_reg, map);
 
   // We didn't match a map.