Retry: Move some sync/notifier to components/invalidation

sync/notifier/unacked_invalidation_set.cc

Index: sync/notifier/unacked_invalidation_set.cc
diff --git a/sync/notifier/unacked_invalidation_set.cc b/sync/notifier/unacked_invalidation_set.cc
index 6991fc069a10beb92d0697ef2d5bc9877b473e77..61c4166c06e5a1a1c998f828016d99eedd67575d 100644
--- a/sync/notifier/unacked_invalidation_set.cc
+++ b/sync/notifier/unacked_invalidation_set.cc
@@ -7,7 +7,6 @@
 #include "base/strings/string_number_conversions.h"
 #include "sync/internal_api/public/base/ack_handle.h"
 #include "sync/notifier/object_id_invalidation_map.h"
-#include "sync/notifier/sync_invalidation_listener.h"
 
 namespace {
 
@@ -27,6 +26,13 @@ UnackedInvalidationSet::UnackedInvalidationSet(
     : registered_(false),
       object_id_(id) {}
 
+UnackedInvalidationSet::UnackedInvalidationSet(
+    const UnackedInvalidationSet& other)
+    : registered_(other.registered_),
+      object_id_(other.object_id_),
+      invalidations_(other.invalidations_) {
+}
+
 UnackedInvalidationSet::~UnackedInvalidationSet() {}
 
 const invalidation::ObjectId& UnackedInvalidationSet::object_id() const {