IDBObserver: Lifetime Management: Adding Observer

content/browser/indexed_db/indexed_db_connection.h

Index: content/browser/indexed_db/indexed_db_connection.h
diff --git a/content/browser/indexed_db/indexed_db_connection.h b/content/browser/indexed_db/indexed_db_connection.h
index 4d828e5e6ff5e28a138f19c79959f5a928ab165e..3c305f39d057147c8a8feb12654a0f826404b09a 100644
--- a/content/browser/indexed_db/indexed_db_connection.h
+++ b/content/browser/indexed_db/indexed_db_connection.h
@@ -10,9 +10,9 @@
 #include "base/memory/weak_ptr.h"
 #include "content/browser/indexed_db/indexed_db_database.h"
 #include "content/browser/indexed_db/indexed_db_database_callbacks.h"
+#include "content/browser/indexed_db/indexed_db_observer.h"
 
 namespace content {
-class IndexedDBCallbacks;
 class IndexedDBDatabaseError;
 
 class CONTENT_EXPORT IndexedDBConnection {
@@ -28,8 +28,22 @@ class CONTENT_EXPORT IndexedDBConnection {
 
   void VersionChangeIgnored();
 
+  virtual void ActivatePendingObservers(
+      std::vector<std::unique_ptr<IndexedDBObserver>> pending_observers);
+  // Removes observer listed in |remove_observer_ids| from active_observer of
+  // connection or pending_observer of transactions associated with this
+  // connection.
+  virtual void RemoveObservers(const std::vector<int32_t>& remove_observer_ids);
+
   IndexedDBDatabase* database() const { return database_.get(); }
   IndexedDBDatabaseCallbacks* callbacks() const { return callbacks_.get(); }
+  const std::vector<std::unique_ptr<IndexedDBObserver>>& active_observers()
+      const {
+    return active_observers_;
+  }
+  base::WeakPtr<IndexedDBConnection> GetWeakPtr() {
+    return weak_factory_.GetWeakPtr();
+  }
 
  private:
   // NULL in some unit tests, and after the connection is closed.
@@ -38,7 +52,7 @@ class CONTENT_EXPORT IndexedDBConnection {
   // The callbacks_ member is cleared when the connection is closed.
   // May be NULL in unit tests.
   scoped_refptr<IndexedDBDatabaseCallbacks> callbacks_;
-
+  std::vector<std::unique_ptr<IndexedDBObserver>> active_observers_;
   base::WeakPtrFactory<IndexedDBConnection> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBConnection);