chromeos: Refactor system tray "show settings" commands to use mojo

ash/common/system/chromeos/power/dual_role_notification.cc

 // Copyright 2015 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 "ash/common/system/chromeos/power/dual_role_notification.h"
 
 #include <set>
 
 #include "ash/common/system/chromeos/power/power_status.h"
 #include "ash/common/system/system_notifier.h"
-#include "ash/common/system/tray/system_tray_delegate.h"
+#include "ash/common/system/tray/system_tray_controller.h"
 #include "ash/common/wm_shell.h"
 #include "base/strings/utf_string_conversions.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/l10n/time_format.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image.h"
 #include "ui/message_center/message_center.h"
 #include "ui/message_center/notification.h"
 #include "ui/message_center/notification_delegate.h"
 
 using message_center::MessageCenter;
 using message_center::Notification;
 
 namespace ash {
 namespace {
 
 const char kDualRoleNotificationId[] = "dual-role";
 
 // Opens power settings on click.
 class DualRoleNotificationDelegate
     : public message_center::NotificationDelegate {
  public:
   DualRoleNotificationDelegate() {}
 
   // Overridden from message_center::NotificationDelegate.
   void Click() override {
-    WmShell::Get()->system_tray_delegate()->ShowPowerSettings();
+    WmShell::Get()->system_tray_controller()->ShowPowerSettings();
   }
 
  private:
   ~DualRoleNotificationDelegate() override {}
 
   DISALLOW_COPY_AND_ASSIGN(DualRoleNotificationDelegate);
 };
 
 }  // namespace
 
@@ skipping 97 matching lines @@
       base::string16(), GURL(),
       message_center::NotifierId(message_center::NotifierId::SYSTEM_COMPONENT,
                                  system_notifier::kNotifierDualRole),
       message_center::RichNotificationData(),
       new DualRoleNotificationDelegate));
   notification->set_priority(message_center::MIN_PRIORITY);
   return notification;
 }
 
 }  // namespace ash