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

components/sync_driver/device_info_util.cc

-// Copyright 2016 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 "components/sync_driver/device_info_util.h"
-
-#include <algorithm>
-
-#include "base/strings/string_util.h"
-#include "components/sync/protocol/sync.pb.h"
-
-namespace sync_driver {
-
-using base::Time;
-using base::TimeDelta;
-using sync_pb::DeviceInfoSpecifics;
-
-const char DeviceInfoUtil::kClientTagPrefix[] = "DeviceInfo_";
-const TimeDelta DeviceInfoUtil::kPulseInterval = TimeDelta::FromDays(1);
-const TimeDelta DeviceInfoUtil::kActiveThreshold = TimeDelta::FromDays(14);
-
-namespace {
-
-base::TimeDelta Age(const base::Time last_update, const base::Time now) {
-  // Don't allow negative age for things somehow updated in the future.
-  return std::max(base::TimeDelta(), now - last_update);
-}
-
-}  // namespace
-
-// static
-base::TimeDelta DeviceInfoUtil::CalculatePulseDelay(
-    const base::Time last_update,
-    const base::Time now) {
-  // Don't allow negative delays for very stale data, use delay of 0.
-  return std::max(base::TimeDelta(), kPulseInterval - Age(last_update, now));
-}
-
-// static
-bool DeviceInfoUtil::IsActive(const Time last_update, const Time now) {
-  return Age(last_update, now) < kActiveThreshold;
-}
-
-// static
-std::string DeviceInfoUtil::SpecificsToTag(
-    const sync_pb::DeviceInfoSpecifics& specifics) {
-  return kClientTagPrefix + specifics.cache_guid();
-}
-
-// static
-std::string DeviceInfoUtil::TagToCacheGuid(const std::string& tag) {
-  DCHECK(base::StartsWith(tag, kClientTagPrefix, base::CompareCase::SENSITIVE));
-  return tag.substr(strlen(kClientTagPrefix));
-}
-
-}  // namespace sync_driver