sync: SyncableService support for starting sync

chrome/browser/sync/glue/sync_start_util.h

Index: chrome/browser/sync/glue/sync_start_util.h
diff --git a/chrome/browser/sync/glue/sync_start_util.h b/chrome/browser/sync/glue/sync_start_util.h
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+// 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.
+//
+// Various utilities for kicking off sync initialization from data types or
+// other services.
+
+#ifndef CHROME_BROWSER_SYNC_GLUE_SYNC_START_UTIL_H_
+#define CHROME_BROWSER_SYNC_GLUE_SYNC_START_UTIL_H_
+
+#include "sync/api/syncable_service.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace sync_start_util {
+
+// Creates a StartSyncFlare that a SyncableService can use to tell
+// ProfileSyncService it needs sync to start ASAP.  Typically this would be
+// given to the SyncableService on construction.
+//
+// The flare built by this function is designed to be Run()able from any thread
+// so that non-UI types don't have to deal with posting tasks.
+//
+// |profile_path| is used to get a hold of the actual Profile* once the
+// request to start sync is safely in UI Thread land.
+syncer::SyncableService::StartSyncFlare GetFlareForSyncableService(
+    const base::FilePath& profile_path);
+
+}  // namespace sync_start_util
+
+#endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_START_UTIL_H_