Add login screen locale and input method device policies

chrome/browser/lifetime/application_lifetime.cc

Index: chrome/browser/lifetime/application_lifetime.cc
diff --git a/chrome/browser/lifetime/application_lifetime.cc b/chrome/browser/lifetime/application_lifetime.cc
index 44eee4a5efdde082522773039100c600665971d8..e6578f0cc5a7d7c0f39d685f53c6935e000605e7 100644
--- a/chrome/browser/lifetime/application_lifetime.cc
+++ b/chrome/browser/lifetime/application_lifetime.cc
@@ -46,10 +46,13 @@
 #if defined(OS_CHROMEOS)
 #include "base/sys_info.h"
 #include "chrome/browser/chromeos/boot_times_recorder.h"
+#include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/power_policy_controller.h"
 #include "chromeos/dbus/session_manager_client.h"
 #include "chromeos/dbus/update_engine_client.h"
+#include "chromeos/settings/cros_settings_names.h"
+#include "ui/base/l10n/l10n_util.h"
 #endif
 
 #if defined(OS_WIN)
@@ -83,6 +86,34 @@ bool AreAllBrowsersCloseable() {
 #endif  // !defined(OS_ANDROID)
 
 #if defined(OS_CHROMEOS)
+// Sets kApplicationLocale in |local_state| for the login screen on the next
+// application start, if it is forced to a specific value due to enterprise
+// policy or the owner's locale.  Returns true if any pref has been modified.
+bool SetLocaleForNextStart(PrefService* local_state) {
+  // If a policy mandates the login screen locale, use it.
+  chromeos::CrosSettings* cros_settings = chromeos::CrosSettings::Get();
+  const base::ListValue* login_screen_locales = nullptr;
+  std::string login_screen_locale;
+  if (cros_settings->GetList(chromeos::kDeviceLoginScreenLocales,
+                             &login_screen_locales) &&
+      !login_screen_locales->empty() &&
+      login_screen_locales->GetString(0, &login_screen_locale)) {
+    local_state->SetString(prefs::kApplicationLocale, login_screen_locale);
+    return true;
+  }
+
+  // Login screen should show up in owner's locale.
+  std::string owner_locale = local_state->GetString(prefs::kOwnerLocale);
+  if (!owner_locale.empty() &&
+      local_state->GetString(prefs::kApplicationLocale) != owner_locale &&
+      !local_state->IsManagedPreference(prefs::kApplicationLocale)) {
+    local_state->SetString(prefs::kApplicationLocale, owner_locale);
+    return true;
+  }
+
+  return false;
+}
+
 // Whether chrome should send stop request to a session manager.
 bool g_send_stop_request_to_session_manager = false;
 #endif
@@ -168,12 +199,7 @@ void AttemptUserExit() {
   if (state) {
     chromeos::BootTimesRecorder::Get()->OnLogoutStarted(state);
 
-    // Login screen should show up in owner's locale.
-    std::string owner_locale = state->GetString(prefs::kOwnerLocale);
-    if (!owner_locale.empty() &&
-        state->GetString(prefs::kApplicationLocale) != owner_locale &&
-        !state->IsManagedPreference(prefs::kApplicationLocale)) {
-      state->SetString(prefs::kApplicationLocale, owner_locale);
+    if (SetLocaleForNextStart(state)) {
       TRACE_EVENT0("shutdown", "CommitPendingWrite");
       state->CommitPendingWrite();
     }