Fix serialization references to Cell objects.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/514783002

Patch from Slava Chigrin <vchigrin@yandex-team.ru>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23484 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/serialize.cc

@@ -1636,6 +1636,7 @@ void Serializer::ObjectSerializer::VisitCell(RelocInfo* rinfo) {
   int skip = OutputRawData(rinfo->pc(), kCanReturnSkipInsteadOfSkipping);
   Cell* object = Cell::cast(rinfo->target_cell());
   serializer_->SerializeObject(object, kPlain, kInnerPointer, skip);
+  bytes_processed_so_far_ += kPointerSize;
 }