[TimeZoneMonitor] Decouple //content/browser/time_zone_monitor* to //device/.

content/browser/time_zone_monitor.cc

-// Copyright 2014 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 "content/browser/time_zone_monitor.h"
-
-#include "base/logging.h"
-#include "build/build_config.h"
-#include "third_party/icu/source/common/unicode/unistr.h"
-#include "third_party/icu/source/i18n/unicode/timezone.h"
-
-namespace content {
-
-TimeZoneMonitor::TimeZoneMonitor() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-}
-
-TimeZoneMonitor::~TimeZoneMonitor() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-}
-
-void TimeZoneMonitor::Bind(device::mojom::TimeZoneMonitorRequest request) {
-  bindings_.AddBinding(this, std::move(request));
-}
-
-void TimeZoneMonitor::NotifyClients() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-#if defined(OS_CHROMEOS)
-  // On CrOS, ICU's default tz is already set to a new zone. No
-  // need to redetect it with detectHostTimeZone().
-  std::unique_ptr<icu::TimeZone> new_zone(icu::TimeZone::createDefault());
-#else
-  icu::TimeZone* new_zone = icu::TimeZone::detectHostTimeZone();
-#if defined(OS_LINUX)
-  // We get here multiple times on Linux per a single tz change, but
-  // want to update the ICU default zone and notify renderer only once.
-  std::unique_ptr<icu::TimeZone> current_zone(icu::TimeZone::createDefault());
-  if (*current_zone == *new_zone) {
-    VLOG(1) << "timezone already updated";
-    delete new_zone;
-    return;
-  }
-#endif
-  icu::TimeZone::adoptDefault(new_zone);
-#endif
-  icu::UnicodeString zone_id;
-  std::string zone_id_str;
-  new_zone->getID(zone_id).toUTF8String(zone_id_str);
-  VLOG(1) << "timezone reset to " << zone_id_str;
-
-  clients_.ForAllPtrs(
-      [&zone_id_str](device::mojom::TimeZoneMonitorClient* client) {
-        client->OnTimeZoneChange(zone_id_str);
-      });
-}
-
-void TimeZoneMonitor::AddClient(
-    device::mojom::TimeZoneMonitorClientPtr client) {
-  clients_.AddPtr(std::move(client));
-}
-
-}  // namespace content