IDBObserver: Lifetime Management: Adding Observer

content/browser/indexed_db/indexed_db_connection.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CONNECTION_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CONNECTION_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #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"
 
 namespace content {
 class IndexedDBCallbacks;
 class IndexedDBDatabaseError;
+class IndexedDBObserver;
 
 class CONTENT_EXPORT IndexedDBConnection {
  public:
   IndexedDBConnection(scoped_refptr<IndexedDBDatabase> db,
                       scoped_refptr<IndexedDBDatabaseCallbacks> callbacks);
   virtual ~IndexedDBConnection();
 
   // These methods are virtual to allow subclassing in unit tests.
   virtual void ForceClose();
   virtual void Close();
   virtual bool IsConnected();
 
   void VersionChangeIgnored();
+  void Unobserve(std::vector<int32_t> observersToRemove);

[dmurph, 2016/06/22 01:09:49]

const ref, and please use underscore_naming

[palakj1, 2016/06/23 20:56:29]

changed to const ref.

 
   IndexedDBDatabase* database() const { return database_.get(); }
   IndexedDBDatabaseCallbacks* callbacks() const { return callbacks_.get(); }
 
+  std::vector<std::unique_ptr<IndexedDBObserver>> active_observers_;
+
  private:
   // NULL in some unit tests, and after the connection is closed.
   scoped_refptr<IndexedDBDatabase> database_;
 
   // The callbacks_ member is cleared when the connection is closed.
   // May be NULL in unit tests.
   scoped_refptr<IndexedDBDatabaseCallbacks> callbacks_;
-
   base::WeakPtrFactory<IndexedDBConnection> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBConnection);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CONNECTION_H_