Avoid handle dereference during graph optimization.

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index 1ca2562d3913a0d5e592b104cb43fbf9500444ec..9cc9a6619a31871665c7c3817e04a69b9d72703d 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -2054,6 +2054,8 @@ class LTransitionElementsKind: public LTemplateInstruction<1, 1, 2> {
 
   Handle<Map> original_map() { return hydrogen()->original_map(); }
   Handle<Map> transitioned_map() { return hydrogen()->transitioned_map(); }
+  ElementsKind from_kind() { return hydrogen()->from_kind(); }
+  ElementsKind to_kind() { return hydrogen()->to_kind(); }
 };