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diff --git a/content/common/web_database_observer_impl.h b/content/common/web_database_observer_impl.h
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+// Copyright (c) 2010 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_COMMON_WEB_DATABASE_OBSERVER_IMPL_H_
+#define CONTENT_COMMON_WEB_DATABASE_OBSERVER_IMPL_H_
+#pragma once
+
+#include "ipc/ipc_message.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDatabaseObserver.h"
+#include "webkit/database/database_connections.h"
+
+class WebDatabaseObserverImpl : public WebKit::WebDatabaseObserver {
+ public:
+  explicit WebDatabaseObserverImpl(IPC::Message::Sender* sender);
+  virtual ~WebDatabaseObserverImpl() {}
+  virtual void databaseOpened(const WebKit::WebDatabase& database);
+  virtual void databaseModified(const WebKit::WebDatabase& database);
+  virtual void databaseClosed(const WebKit::WebDatabase& database);
+
+  void WaitForAllDatabasesToClose();
+
+ private:
+  IPC::Message::Sender* sender_;
+  bool waiting_for_dbs_to_close_;
+  webkit_database::DatabaseConnections database_connections_;
+};
+
+#endif  // CONTENT_COMMON_WEB_DATABASE_OBSERVER_IMPL_H_