Login screen and Guest mode should use device owner preference

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index 75897f22c2549109d3454dc419cf9a0ca2a0c34f..4b40a2ec4c20a80e98331732b682dba8d5f659d5 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -12,6 +12,7 @@
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
+#include "base/i18n/time_formatting.h"
 #include "base/path_service.h"
 #include "base/prefs/json_pref_store.h"
 #include "base/prefs/pref_registry_simple.h"
@@ -697,6 +698,8 @@ void BrowserProcessImpl::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterStringPref(prefs::kOwnerLocale, std::string());
   registry->RegisterStringPref(prefs::kHardwareKeyboardLayout,
                                std::string());
+  registry->RegisterBooleanPref(prefs::kOwnerPrefUse24HourClock,
+                                base::GetHourClockType() == base::k24HourClock);
 #endif  // defined(OS_CHROMEOS)
 #if !defined(OS_CHROMEOS)
   registry->RegisterBooleanPref(