[Interpreter] Log code-creation events for bytecode handlers.

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 32ebdc00e9159a256d10fa1d1456758734cc6b9d..e5da3d57c6b11b62c137dbcb783b243247d632c9 100644
--- a/src/snapshot/code-serializer.cc
+++ b/src/snapshot/code-serializer.cc
@@ -71,6 +71,7 @@ void CodeSerializer::SerializeObject(HeapObject* obj, HowToCode how_to_code,
         SerializeBuiltin(code_object->builtin_index(), how_to_code,
                          where_to_point);
         return;
+      case Code::BYTECODE_HANDLER:

[Yang, 2016/03/09 13:02:18]

Please move this to the CHECK(false) cases above. This cannot and must not
happen. The code cache must not contain any references directly to the bytecode
handlers.

[Stefano Sanfilippo, 2016/03/09 14:41:44]

Done.

       case Code::STUB:
         SerializeCodeStub(code_object->stub_key(), how_to_code, where_to_point);
         return;