Replacing Indexed DB Chromium IPC with Mojo

content/browser/indexed_db/indexed_db_change_handler.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_CHANGE_HANDLER_H_
+#define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CHANGE_HANDLER_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class IndexedDBConnection;
+class IndexedDBDatabaseError;
+class IndexedDBObserverChanges;
+
+// A utility class to handle certain change events and notify recipients of
+// those changes.
+class CONTENT_EXPORT IndexedDBChangeHandler
+    : public base::RefCounted<IndexedDBChangeHandler> {
+ public:
+  virtual void OnForcedClose() = 0;
+  virtual void OnVersionChange(int64_t old_version, int64_t new_version) = 0;
+
+  virtual void OnAbort(int64_t transaction_id,
+                       const IndexedDBDatabaseError& error) = 0;
+  virtual void OnComplete(int64_t transaction_id) = 0;
+  virtual void OnDatabaseChange(
+      int32_t ipc_database_id,
+      std::unique_ptr<IndexedDBObserverChanges> changes) = 0;
+
+  virtual void SetConnection(base::WeakPtr<IndexedDBConnection> connection) = 0;
+
+ protected:
+  IndexedDBChangeHandler() {}
+  virtual ~IndexedDBChangeHandler() {}
+
+ private:
+  friend class base::RefCounted<IndexedDBChangeHandler>;
+
+  DISALLOW_COPY_AND_ASSIGN(IndexedDBChangeHandler);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CHANGE_HANDLER_H_