Refactor elements kind conversion.

src/arm/ic-arm.cc

Index: src/arm/ic-arm.cc
diff --git a/src/arm/ic-arm.cc b/src/arm/ic-arm.cc
index e65249022751dd2f33aa3380162d8cc6cd94a33f..716ead6ad633ff29ee7c5796c257602ec511e105 100644
--- a/src/arm/ic-arm.cc
+++ b/src/arm/ic-arm.cc
@@ -1250,6 +1250,13 @@ void KeyedStoreIC::GenerateTransitionElementsSmiToDouble(MacroAssembler* masm) {
   //  -- lr     : return address
   // -----------------------------------
   // Must return the modified receiver in r0.
+  if (!FLAG_trace_elements_transitions) {
+    Label fail;
+    ElementsTransitionGenerator::GenerateSmiOnlyToDouble(masm, &fail);
+    __ mov(r0, r2);
+    __ Ret();
+    __ bind(&fail);
+  }
 
   __ push(r2);
   __ TailCallRuntime(Runtime::kTransitionElementsSmiToDouble, 1, 1);
@@ -1263,6 +1270,13 @@ void KeyedStoreIC::GenerateTransitionElementsDoubleToObject(
   //  -- lr     : return address
   // -----------------------------------
   // Must return the modified receiver in r0.
+  if (!FLAG_trace_elements_transitions) {
+    Label fail;
+    ElementsTransitionGenerator::GenerateDoubleToObject(masm, &fail);
+    __ mov(r0, r2);
+    __ Ret();
+    __ bind(&fail);
+  }
 
   __ push(r2);
   __ TailCallRuntime(Runtime::kTransitionElementsDoubleToObject, 1, 1);