[stubs] Remove the is_jsarray bit from the TransitionElementsKindStub.

src/crankshaft/ia32/lithium-codegen-ia32.cc

Index: src/crankshaft/ia32/lithium-codegen-ia32.cc
diff --git a/src/crankshaft/ia32/lithium-codegen-ia32.cc b/src/crankshaft/ia32/lithium-codegen-ia32.cc
index 07cd96398e6c47eb568e7710fe6a36c9078ffb9f..169036856c13761eec864f4147f773645d2eeb31 100644
--- a/src/crankshaft/ia32/lithium-codegen-ia32.cc
+++ b/src/crankshaft/ia32/lithium-codegen-ia32.cc
@@ -3999,8 +3999,7 @@ 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);