IDBObserver: Lifetime Management: Adding Observer

content/browser/indexed_db/indexed_db_transaction.h

Index: content/browser/indexed_db/indexed_db_transaction.h
diff --git a/content/browser/indexed_db/indexed_db_transaction.h b/content/browser/indexed_db/indexed_db_transaction.h
index 816e84ba0b44bacf25492aff494eda6bcb8057b1..59ce5f8c540d661a175616fad1eed20c11d2b639 100644
--- a/content/browser/indexed_db/indexed_db_transaction.h
+++ b/content/browser/indexed_db/indexed_db_transaction.h
@@ -64,7 +64,7 @@ class CONTENT_EXPORT IndexedDBTransaction
     pending_preemptive_events_--;
     DCHECK_GE(pending_preemptive_events_, 0);
   }
-  void AddPendingObserver(std::unique_ptr<IndexedDBObserver> observer);
+  void AddPendingObserver(int64_t observer_id, IndexedDBObserver* observer);
 
   IndexedDBBackingStore::Transaction* BackingStoreTransaction() {
     return transaction_.get();
@@ -179,7 +179,7 @@ class CONTENT_EXPORT IndexedDBTransaction
   int pending_preemptive_events_;
 
   std::set<IndexedDBCursor*> open_cursors_;
-  std::vector<std::unique_ptr<IndexedDBObserver>> pending_observers_;
+  std::map<int64_t, IndexedDBObserver*> pending_observers_;
 
   // This timer is started after requests have been processed. If no subsequent
   // requests are processed before the timer fires, assume the script is