Support comma separated hardware keyboard layout.

chrome/browser/chromeos/preferences.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/preferences.h"
 
+#include <vector>
+
 #include "ash/autoclick/autoclick_controller.h"
 #include "ash/magnifier/magnifier_constants.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/i18n/time_formatting.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_member.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/strings/string_split.h"
@@ skipping 68 matching lines @@
 
 // static
 void Preferences::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   std::string hardware_keyboard_id;
   // TODO(yusukes): Remove the runtime hack.
   if (base::SysInfo::IsRunningOnChromeOS()) {
     input_method::InputMethodManager* manager =
         input_method::InputMethodManager::Get();
     if (manager) {
-      hardware_keyboard_id =
-          manager->GetInputMethodUtil()->GetHardwareInputMethodId();
+      const std::vector<std::string>& hardware_layouts =
+          manager->GetInputMethodUtil()->GetHardwareInputMethodIds();
+      hardware_keyboard_id = JoinString(hardware_layouts, ',');
     }
   } else {
     hardware_keyboard_id = "xkb:us::eng";  // only for testing.
   }
 
   registry->RegisterBooleanPref(
       prefs::kPerformanceTracingEnabled,
       false,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 
@@ skipping 522 matching lines @@
 }
 
 void Preferences::OnTouchHudProjectionToggled(bool enabled) {
   if (touch_hud_projection_enabled_.GetValue() == enabled)
     return;
 
   touch_hud_projection_enabled_.SetValue(enabled);
 }
 
 }  // namespace chromeos