ChromeOS: Implement periodic timezone refresh on geolocation data.

chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc

Index: chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
diff --git a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
index a8088e314fe172e474895b7e19d59e85ea2cd95c..29b625dbd4f0d6f2af553747f9dffe98082d69a4 100644
--- a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
+++ b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.cc
@@ -36,6 +36,7 @@
 #include "chrome/browser/chromeos/profiles/multiprofiles_session_aborted_dialog.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/chromeos/session_length_limiter.h"
+#include "chrome/browser/chromeos/system/timezone_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/easy_unlock_service.h"
 #include "chrome/browser/supervised_user/chromeos/manager_password_service_factory.h"
@@ -378,6 +379,7 @@ void ChromeUserManagerImpl::Observe(
           sync_observer->StartObserving();
           multi_profile_user_controller_->StartObserving(profile);
         }
+        StartUserTimeZoneRefresh(profile);

[Dmitry Polukhin, 2015/01/20 15:32:28]

I think in Guest mode we don't need to refresh timezone. As for Kiosk mode I
think we need to check with PMs.

[Alexander Alekseev, 2015/01/22 18:55:22]

Done.

       }
       break;
     }
@@ -1077,4 +1079,18 @@ void ChromeUserManagerImpl::UpdateNumberOfUsers() {
       base::StringPrintf("%" PRIuS, GetLoggedInUsers().size()));
 }
 
+void ChromeUserManagerImpl::StartUserTimeZoneRefresh(Profile* profile) {
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          chromeos::switches::kEnableTimeZoneTrackingOption)) {
+    return;
+  }
+
+  if (profile->GetPrefs()->GetBoolean(prefs::kResolveTimezoneByGeolocation) &&
+      !system::HasSystemTimezonePolicy()) {
+    g_browser_process->platform_part()->timezone_resolver()->Start();
+  } else {
+    g_browser_process->platform_part()->timezone_resolver()->Stop();
+  }
+}
+
 }  // namespace chromeos