Guest Mode: input method should default to the underlying latin keyboard layout.

chrome/browser/chromeos/login/user_manager_impl.cc

Index: chrome/browser/chromeos/login/user_manager_impl.cc
diff --git a/chrome/browser/chromeos/login/user_manager_impl.cc b/chrome/browser/chromeos/login/user_manager_impl.cc
index d0ce2ceba88680d52ad23fa4150091b73fac4954..5f258e74271a29d3243de12dd08fbcac092feadd 100644
--- a/chrome/browser/chromeos/login/user_manager_impl.cc
+++ b/chrome/browser/chromeos/login/user_manager_impl.cc
@@ -798,13 +798,21 @@ bool UserManagerImpl::RespectLocalePreference(
                        : (std::string("account_locale - unused. ")))
                << " Selected '" << pref_locale << "'";
   profile->ChangeAppLocale(pref_locale, Profile::APP_LOCALE_CHANGED_VIA_LOGIN);
-  // Here we don't enable keyboard layouts. Input methods are set up when
-  // the user first logs in. Then the user may customize the input methods.
-  // Hence changing input methods here, just because the user's UI language
-  // is different from the login screen UI language, is not desirable. Note
-  // that input method preferences are synced, so users can use their
-  // farovite input methods as soon as the preferences are synced.
-  locale_util::SwitchLanguage(pref_locale, false, callback.Pass());
+
+  // Here we don't enable keyboard layouts for normal users. Input methods
+  // are set up when the user first logs in. Then the user may customize the
+  // input methods.  Hence changing input methods here, just because the user's
+  // UI language is different from the login screen UI language, is not
+  // desirable. Note that input method preferences are synced, so users can use
+  // their farovite input methods as soon as the preferences are synced.
+  //
+  // For Guest mode, user locale preferences will never get initialized.
+  // So input methods should be enabled somewhere.
+  const bool enable_layouts = UserManager::Get()->IsLoggedInAsGuest();
+  locale_util::SwitchLanguage(pref_locale,
+                              enable_layouts,
+                              false /* login_layouts_only */,
+                              callback.Pass());
 
   return true;
 }