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

sync/engine/backoff_delay_provider.cc

Index: sync/engine/backoff_delay_provider.cc
diff --git a/sync/engine/backoff_delay_provider.cc b/sync/engine/backoff_delay_provider.cc
deleted file mode 100644
index 864401cc9c9cb390d24cfbed446f97cacf5ed0e8..0000000000000000000000000000000000000000
--- a/sync/engine/backoff_delay_provider.cc
+++ /dev/null
@@ -1,109 +0,0 @@
-// 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 "sync/engine/backoff_delay_provider.h"
-
-#include <stdint.h>
-
-#include <algorithm>
-
-#include "base/rand_util.h"
-#include "sync/internal_api/public/engine/polling_constants.h"
-#include "sync/internal_api/public/sessions/model_neutral_state.h"
-#include "sync/internal_api/public/util/syncer_error.h"
-
-using base::TimeDelta;
-
-namespace syncer {
-
-// static
-BackoffDelayProvider* BackoffDelayProvider::FromDefaults() {
-  return new BackoffDelayProvider(
-      TimeDelta::FromSeconds(kInitialBackoffRetrySeconds),
-      TimeDelta::FromSeconds(kInitialBackoffImmediateRetrySeconds));
-}
-
-// static
-BackoffDelayProvider* BackoffDelayProvider::WithShortInitialRetryOverride() {
-  return new BackoffDelayProvider(
-      TimeDelta::FromSeconds(kInitialBackoffShortRetrySeconds),
-      TimeDelta::FromSeconds(kInitialBackoffImmediateRetrySeconds));
-}
-
-BackoffDelayProvider::BackoffDelayProvider(
-    const base::TimeDelta& default_initial_backoff,
-    const base::TimeDelta& short_initial_backoff)
-    : default_initial_backoff_(default_initial_backoff),
-      short_initial_backoff_(short_initial_backoff) {
-}
-
-BackoffDelayProvider::~BackoffDelayProvider() {}
-
-TimeDelta BackoffDelayProvider::GetDelay(const base::TimeDelta& last_delay) {
-  if (last_delay.InSeconds() >= kMaxBackoffSeconds)
-    return TimeDelta::FromSeconds(kMaxBackoffSeconds);
-
-  // This calculates approx. base_delay_seconds * 2 +/- base_delay_seconds / 2
-  int64_t backoff_s =
-      std::max(static_cast<int64_t>(1),
-               last_delay.InSeconds() * kBackoffRandomizationFactor);
-
-  // Flip a coin to randomize backoff interval by +/- 50%.
-  int rand_sign = base::RandInt(0, 1) * 2 - 1;
-
-  // Truncation is adequate for rounding here.
-  backoff_s = backoff_s +
-      (rand_sign * (last_delay.InSeconds() / kBackoffRandomizationFactor));
-
-  // Cap the backoff interval.
-  backoff_s = std::max(static_cast<int64_t>(1),
-                       std::min(backoff_s, kMaxBackoffSeconds));
-
-  return TimeDelta::FromSeconds(backoff_s);
-}
-
-TimeDelta BackoffDelayProvider::GetInitialDelay(
-    const sessions::ModelNeutralState& state) const {
-  // NETWORK_CONNECTION_UNAVAILABLE implies we did not receive HTTP response
-  // from server because of some network error. If network is unavailable then
-  // on next connection type or address change scheduler will run canary job.
-  // Otherwise we'll retry in 30 seconds.
-  if (state.commit_result == NETWORK_CONNECTION_UNAVAILABLE ||
-      state.last_download_updates_result == NETWORK_CONNECTION_UNAVAILABLE) {
-    return default_initial_backoff_;
-  }
-
-  if (SyncerErrorIsError(state.last_get_key_result))
-    return default_initial_backoff_;
-
-  // Note: If we received a MIGRATION_DONE on download updates, then commit
-  // should not have taken place.  Moreover, if we receive a MIGRATION_DONE
-  // on commit, it means that download updates succeeded.  Therefore, we only
-  // need to check if either code is equal to SERVER_RETURN_MIGRATION_DONE,
-  // and not if there were any more serious errors requiring the long retry.
-  if (state.last_download_updates_result == SERVER_RETURN_MIGRATION_DONE ||
-      state.commit_result == SERVER_RETURN_MIGRATION_DONE) {
-    return short_initial_backoff_;
-  }
-
-  // If a datatype decides the GetUpdates must be retried (e.g. because the
-  // context has been updated since the request), use the short delay.
-  if (state.last_download_updates_result == DATATYPE_TRIGGERED_RETRY)
-    return short_initial_backoff_;
-
-  // When the server tells us we have a conflict, then we should download the
-  // latest updates so we can see the conflict ourselves, resolve it locally,
-  // then try again to commit.  Running another sync cycle will do all these
-  // things.  There's no need to back off, we can do this immediately.
-  //
-  // TODO(sync): We shouldn't need to handle this in BackoffDelayProvider.
-  // There should be a way to deal with protocol errors before we get to this
-  // point.
-  if (state.commit_result == SERVER_RETURN_CONFLICT)
-    return short_initial_backoff_;
-
-  return default_initial_backoff_;
-}
-
-}  // namespace syncer