[Sync] Move //sync to //components/sync.

sync/internal_api/public/engine/polling_constants.cc

-// 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.
-
-#include <stdint.h>
-
-#include "sync/internal_api/public/engine/polling_constants.h"
-
-namespace syncer {
-
-// Server can overwrite these values via client commands.
-// Standard short poll. This is used when XMPP is off.
-// We use high values here to ensure that failure to receive poll updates from
-// the server doesn't result in rapid-fire polling from the client due to low
-// local limits.
-const int64_t kDefaultShortPollIntervalSeconds = 3600 * 8;
-// Long poll is used when XMPP is on.
-const int64_t kDefaultLongPollIntervalSeconds = 3600 * 12;
-
-// Maximum interval for exponential backoff.
-const int64_t kMaxBackoffSeconds = 60 * 10;  // 10 minutes.
-
-// Backoff interval randomization factor.
-const int kBackoffRandomizationFactor = 2;
-
-// After a failure contacting sync servers, specifies how long to wait before
-// reattempting and entering exponential backoff if consecutive failures
-// occur.
-const int kInitialBackoffRetrySeconds = 30;  // 30 seconds.
-
-// A dangerously short retry value that would not actually protect servers from
-// DDoS if it were used as a seed for exponential backoff, although the client
-// would still follow exponential backoff.  Useful for debugging and tests (when
-// you don't want to wait 5 minutes).
-const int kInitialBackoffShortRetrySeconds = 1;
-
-// Similar to kInitialBackoffRetrySeconds above, but only to be used in
-// certain exceptional error cases, such as MIGRATION_DONE.
-const int kInitialBackoffImmediateRetrySeconds = 0;
-
-}  // namespace syncer