Special case the recording of constant pool entries in the slot buffer.

src/serialize.cc

Index: src/serialize.cc
diff --git a/src/serialize.cc b/src/serialize.cc
index 14b1b9cc961489a77d34b284ad3f1489edf21a90..70484b130c32119120e0a638ea840d91caad5f17 100644
--- a/src/serialize.cc
+++ b/src/serialize.cc
@@ -1680,6 +1680,17 @@ void Serializer::ObjectSerializer::VisitRuntimeEntry(RelocInfo* rinfo) {
 }
 
 
+void Serializer::ObjectSerializer::VisitCodeTarget(
+      Address target_address_pointer) {
+  int skip = OutputRawData(target_address_pointer,
+                           kCanReturnSkipInsteadOfSkipping);
+  Code* object = Code::GetCodeFromTargetAddress(
+      Memory::Address_at(target_address_pointer));
+  serializer_->SerializeObject(object, kFromCode, kInnerPointer, skip);
+  bytes_processed_so_far_ += kPointerSize;
+}
+
+
 void Serializer::ObjectSerializer::VisitCodeTarget(RelocInfo* rinfo) {
   int skip = OutputRawData(rinfo->target_address_address(),
                            kCanReturnSkipInsteadOfSkipping);