Fix issue with serializing typed array views

runtime/vm/snapshot.cc

Index: runtime/vm/snapshot.cc
diff --git a/runtime/vm/snapshot.cc b/runtime/vm/snapshot.cc
index 6dbff558cea84fb0debf725b8ec403680a6f7486..d7ba30d8948ff23bec601bb9f5a86be8a30f20aa 100644
--- a/runtime/vm/snapshot.cc
+++ b/runtime/vm/snapshot.cc
@@ -980,6 +980,10 @@ void SnapshotWriter::WriteObjectRef(RawObject* raw) {
 
     return;
   }
+  if (RawObject::IsTypedDataViewClassId(class_id)) {
+    WriteInstanceRef(raw, cls);
+    return;
+  }
   // Object is being referenced, add it to the forward ref list and mark
   // it so that future references to this object in the snapshot will use
   // this object id. Mark it as not having been serialized yet so that we
@@ -1014,15 +1018,6 @@ void SnapshotWriter::WriteObjectRef(RawObject* raw) {
       return;
     }
 #undef SNAPSHOT_WRITE
-#define SNAPSHOT_WRITE(clazz)                                                  \
-    case kTypedData##clazz##ViewCid:                                           \
-
-    CLASS_LIST_TYPED_DATA(SNAPSHOT_WRITE)
-    case kByteDataViewCid: {
-      WriteInstanceRef(raw, cls);
-      return;
-    }
-#undef SNAPSHOT_WRITE
     default: break;
   }
   UNREACHABLE();
@@ -1088,6 +1083,7 @@ intptr_t SnapshotWriter::MarkObject(RawObject* raw, SerializeState state) {
   value = SerializedHeaderTag::update(kObjectId, value);
   value = SerializedHeaderData::update(object_id, value);
   uword tags = raw->ptr()->tags_;
+  ASSERT(SerializedHeaderTag::decode(tags) != kObjectId);
   raw->ptr()->tags_ = value;
   ForwardObjectNode* node = new ForwardObjectNode(raw, tags, state);
   ASSERT(node != NULL);