[Sync] Move BridgedSyncNotifier and ChromeSyncNotificationBridge to glue/

chrome/browser/sync/notifier/chrome_sync_notification_bridge.h

-// Copyright (c) 2012 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 CHROME_BROWSER_SYNC_NOTIFIER_CHROME_SYNC_NOTIFICATION_BRIDGE_H_
-#define CHROME_BROWSER_SYNC_NOTIFIER_CHROME_SYNC_NOTIFICATION_BRIDGE_H_
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/observer_list_threadsafe.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-
-class Profile;
-
-namespace sync_notifier {
-
-class SyncNotifierObserver;
-
-// A thread-safe bridge for chrome events that can trigger sync notifications.
-// Currently only listens to NOTIFICATION_SYNC_REFRESH, triggering each
-// observer's OnIncomingNotification method. Only the SESSIONS datatype is
-// currently expected to be able to trigger this notification.
-// Note: Notifications are expected to arrive on the UI thread, but observers
-// may live on any thread.
-class ChromeSyncNotificationBridge : public content::NotificationObserver {
- public:
-  explicit ChromeSyncNotificationBridge(const Profile* profile);
-  virtual ~ChromeSyncNotificationBridge();
-
-  // These can be called on any thread.
-  virtual void AddObserver(SyncNotifierObserver* observer);
-  virtual void RemoveObserver(SyncNotifierObserver* observer);
-
-  // NotificationObserver implementation. Called on UI thread.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
- private:
-  content::NotificationRegistrar registrar_;
-
-  // Because [Add/Remove]Observer can be called from any thread, we need a
-  // thread-safe observerlist.
-  scoped_refptr<ObserverListThreadSafe<SyncNotifierObserver> > observers_;
-};
-
-}  // namespace sync_notifier
-
-#endif  // CHROME_BROWSER_SYNC_NOTIFIER_CHROME_SYNC_NOTIFICATION_BRIDGE_H_