[stubs] Remove the is_jsarray bit from the TransitionElementsKindStub.

src/crankshaft/x87/lithium-codegen-x87.cc

Index: src/crankshaft/x87/lithium-codegen-x87.cc
diff --git a/src/crankshaft/x87/lithium-codegen-x87.cc b/src/crankshaft/x87/lithium-codegen-x87.cc
index 71f68d581e60fb38ec1d975f5947055e261976d8..2b88f0f1ce65c96d7d543eb0c25f64333d0f024b 100644
--- a/src/crankshaft/x87/lithium-codegen-x87.cc
+++ b/src/crankshaft/x87/lithium-codegen-x87.cc
@@ -4408,8 +4408,7 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
     DCHECK(object_reg.is(eax));
     PushSafepointRegistersScope scope(this);
     __ mov(ebx, to_map);
-    bool is_js_array = from_map->instance_type() == JS_ARRAY_TYPE;
-    TransitionElementsKindStub stub(isolate(), from_kind, to_kind, is_js_array);
+    TransitionElementsKindStub stub(isolate(), from_kind, to_kind);
     __ CallStub(&stub);
     RecordSafepointWithLazyDeopt(instr,
         RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS);