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diff --git a/chrome/browser/sync/glue/chrome_sync_notification_bridge.h b/chrome/browser/sync/glue/chrome_sync_notification_bridge.h
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+++ b/chrome/browser/sync/glue/chrome_sync_notification_bridge.h
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+// 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_GLUE_CHROME_SYNC_NOTIFICATION_BRIDGE_H_
+#define CHROME_BROWSER_SYNC_GLUE_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;
+}  // namespace
+
+namespace browser_sync {
+
+// 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(sync_notifier::SyncNotifierObserver* observer);
+  virtual void RemoveObserver(sync_notifier::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<sync_notifier::SyncNotifierObserver> >
+      observers_;
+};
+
+}  // namespace browser_sync
+
+#endif  // CHROME_BROWSER_SYNC_GLUE_CHROME_SYNC_NOTIFICATION_BRIDGE_H_