Added a Isolate* parameter to Serializer::enabled().

src/serialize.h

Index: src/serialize.h
diff --git a/src/serialize.h b/src/serialize.h
index 2d65436460887c8dd024d58de3975fa3f3875fcd..a030bc38b4a0e6789dc936f343ef9b0fa4c4c357 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -474,7 +474,7 @@ class Serializer : public SerializerDeserializer {
   static void InitializeOncePerProcess();
   static void TearDown();
 
-  static bool enabled() {
+  static bool enabled(Isolate* isolate) {
     SerializationState state = static_cast<SerializationState>(
         NoBarrier_Load(&serialization_state_));
     ASSERT(state != SERIALIZER_STATE_UNINITIALIZED);