Fix null-dereference in r23716.

src/type-info.cc

Index: src/type-info.cc
diff --git a/src/type-info.cc b/src/type-info.cc
index cbf4ffdd5c5a58c6082d8f4406f58ec6f4e557d8..da993a19e429d4122ea02a5d6b6b824018fdb130 100644
--- a/src/type-info.cc
+++ b/src/type-info.cc
@@ -195,8 +195,10 @@ void TypeFeedbackOracle::CompareType(TypeFeedbackId id,
   }
 
   if (code->is_compare_ic_stub()) {
-    CompareIC::StubInfoToType(code->stub_key(), left_type, right_type,
-                              combined_type, map, zone());
+    CompareICStub stub(code->stub_key(), isolate());
+    *left_type = CompareIC::StateToType(zone(), stub.left());
+    *right_type = CompareIC::StateToType(zone(), stub.right());
+    *combined_type = CompareIC::StateToType(zone(), stub.state(), map);
   } else if (code->is_compare_nil_ic_stub()) {
     CompareNilICStub stub(isolate(), code->extra_ic_state());
     *combined_type = stub.GetType(zone(), map);