[turbofan] Stub for typeof operator.

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 a51c33f0f1cc44ea529e8af65c1db366557d27ca..184c516558af5b20c6cd6610b400a247e5aa2e05 100644
--- a/src/crankshaft/x87/lithium-codegen-x87.cc
+++ b/src/crankshaft/x87/lithium-codegen-x87.cc
@@ -5431,8 +5431,8 @@ void LCodeGen::DoTypeof(LTypeof* instr) {
   __ mov(eax, Immediate(isolate()->factory()->number_string()));
   __ jmp(&end);
   __ bind(&do_call);
-  TypeofStub stub(isolate());
-  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+  Callable callable = CodeFactory::Typeof(isolate());
+  CallCode(callable.code(), RelocInfo::CODE_TARGET, instr);
   __ bind(&end);
 }