Allow customization of HttpPostProviderFactory via ProfileSyncService

sync/internal_api/public/network_time_update_callback.h

+// Copyright 2013 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 SYNC_INTERNAL_API_PUBLIC_NETWORK_TIME_UPDATE_CALLBACK_H_
+#define SYNC_INTERNAL_API_PUBLIC_NETWORK_TIME_UPDATE_CALLBACK_H_
+
+#include "base/callback.h"
+#include "base/time/time.h"
+
+namespace syncer {
+
+// TODO(pvalenzuela): Avoid duplication of this typedef by defining it in a
+// common location. This is duplicated here because its original definition in
+// NetworkTimeTracker cannot be depended on.
+//
+// Callback for updating the network time.
+// Params:
+// const base::Time& network_time - the new network time.
+// const base::TimeDelta& resolution - how precise the reading is.
+// const base::TimeDelta& latency - the http request's latency.
+typedef base::Callback<void(const base::Time&,
+                            const base::TimeDelta&,
+                            const base::TimeDelta&)> NetworkTimeUpdateCallback;
+
+}  // namespace syncer
+
+#endif  // SYNC_INTERNAL_API_PUBLIC_NETWORK_TIME_UPDATE_CALLBACK_H_