Revert r13025 and r13026 (they introduced a bug on arm and regressed octane crypto).

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 94e5b576b7d7925250781f3c921dda7fd70296c4..1f6c5adb9855548186d28cfa92c0d266080b23bf 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -4942,12 +4942,11 @@ void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
   SmallMapList* map_set = instr->hydrogen()->map_set();
   for (int i = 0; i < map_set->length() - 1; i++) {
     Handle<Map> map = map_set->at(i);
-    __ CompareMap(reg, scratch, map, &success, instr->hydrogen()->mode());
+    __ CompareMap(reg, scratch, map, &success, REQUIRE_EXACT_MAP);
     __ b(eq, &success);
   }
   Handle<Map> map = map_set->last();
-  DoCheckMapCommon(reg, scratch, map, instr->hydrogen()->mode(),
-                   instr->environment());
+  DoCheckMapCommon(reg, scratch, map, REQUIRE_EXACT_MAP, instr->environment());
   __ bind(&success);
 }