[ic] [stubs] Remove InlineCacheState field from the code flags.

src/snapshot/code-serializer.cc

Index: src/snapshot/code-serializer.cc
diff --git a/src/snapshot/code-serializer.cc b/src/snapshot/code-serializer.cc
index 8eab571cab9339d873f4a516d8469545c1eab69d..d0095cc71c1eaedfee913a1354c7cf35443e9b63 100644
--- a/src/snapshot/code-serializer.cc
+++ b/src/snapshot/code-serializer.cc
@@ -67,6 +67,7 @@ void CodeSerializer::SerializeObject(HeapObject* obj, HowToCode how_to_code,
       case Code::NUMBER_OF_KINDS:     // Pseudo enum value.
       case Code::BYTECODE_HANDLER:    // No direct references to handlers.
         CHECK(false);
+      case Code::DEBUG_STUB:
       case Code::BUILTIN:
         SerializeBuiltin(code_object->builtin_index(), how_to_code,
                          where_to_point);