Always require exact maps.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index e72b676708fe8d0280f29a70f9c1daa9fb6f1dc1..0ca3ddec65df7d0862c6a8036eb07af2566f82f0 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -834,15 +834,13 @@ class MacroAssembler: public Assembler {
   void CompareMap(Register obj,
                   Register scratch,
                   Handle<Map> map,
-                  Label* early_success,
-                  CompareMapMode mode = REQUIRE_EXACT_MAP);
+                  Label* early_success);
 
   // As above, but the map of the object is already loaded into the register
   // which is preserved by the code generated.
   void CompareMap(Register obj_map,
                   Handle<Map> map,
-                  Label* early_success,
-                  CompareMapMode mode = REQUIRE_EXACT_MAP);
+                  Label* early_success);
 
   // 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
@@ -852,8 +850,7 @@ class MacroAssembler: public Assembler {
                 Register scratch,
                 Handle<Map> map,
                 Label* fail,
-                SmiCheckType smi_check_type,
-                CompareMapMode mode = REQUIRE_EXACT_MAP);
+                SmiCheckType smi_check_type);
 
 
   void CheckMap(Register obj,