Replacing Indexed DB Chromium IPC with Mojo

content/browser/indexed_db/indexed_db_open_request_observer.h

+// Copyright 2016 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_OPEN_REQUEST_OBSERVER_H_
+#define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_OPEN_REQUEST_OBSERVER_H_
+
+#include <memory>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class IndexedDBConnection;
+struct IndexedDBDatabaseMetadata;
+struct IndexedDBDataLossInfo;
+
+// Used during database open (and delete).
+class CONTENT_EXPORT IndexedDBOpenRequestObserver
+    : public base::RefCounted<IndexedDBOpenRequestObserver> {
+ public:
+  IndexedDBOpenRequestObserver() {}
+
+  // Called when a database open is blocked.
+  virtual void OnBlocked(int64_t old_version) = 0;
+
+  // Called during database upgrade.
+  virtual void OnUpgradeNeeded(
+      int64_t old_version,
+      IndexedDBConnection* connection,
+      const IndexedDBDataLossInfo& data_loss_info,
+      const IndexedDBDatabaseMetadata& index_metadata) = 0;
+
+ protected:
+  virtual ~IndexedDBOpenRequestObserver() {}
+
+ private:
+  friend class base::RefCounted<IndexedDBOpenRequestObserver>;
+
+  DISALLOW_COPY_AND_ASSIGN(IndexedDBOpenRequestObserver);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_OPEN_REQUEST_OBSERVER_H_