sync: beginnings of MessageLoop based SyncerThread

chrome/browser/sync/engine/polling_constants.h

Index: chrome/browser/sync/engine/polling_constants.h
diff --git a/chrome/browser/sync/engine/polling_constants.h b/chrome/browser/sync/engine/polling_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..a970f96ccd74097c870568e5eaf3ba7ee44b1983
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+++ b/chrome/browser/sync/engine/polling_constants.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.
+//
+// Constants used by SyncerThread when polling servers for updates.
+
+#ifndef CHROME_BROWSER_SYNC_ENGINE_POLLING_CONSTANTS_H_
+#define CHROME_BROWSER_SYNC_ENGINE_POLLING_CONSTANTS_H_
+#pragma once
+
+namespace browser_sync {
+
+extern const int64 kDefaultShortPollIntervalSeconds;
+extern const int64 kDefaultLongPollIntervalSeconds;
+extern const int64 kMaxBackoffSeconds;
+extern const int kBackoffRandomizationFactor;
+
+}  // namespace browser_sync
+
+#endif  // CHROME_BROWSER_SYNC_ENGINE_POLLING_CONSTANTS_H_