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

ash/common/system/date/date_default_view.cc

 // Copyright 2014 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/date/date_default_view.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/metrics/user_metrics_action.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/system/date/date_view.h"
 #include "ash/common/system/tray/special_popup_row.h"
 #include "ash/common/system/tray/system_tray.h"
+#include "ash/common/system/tray/system_tray_controller.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/tray_popup_header_button.h"
 #include "ash/common/wm_shell.h"
 #include "ash/resources/vector_icons/vector_icons.h"
 #include "base/i18n/rtl.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/paint_vector_icon.h"
@@ skipping 123 matching lines @@
 const tray::DateView* DateDefaultView::GetDateView() const {
   return date_view_;
 }
 
 void DateDefaultView::ButtonPressed(views::Button* sender,
                                     const ui::Event& event) {
   WmShell* shell = WmShell::Get();
   SystemTrayDelegate* tray_delegate = shell->system_tray_delegate();
   if (sender == help_button_) {
     shell->RecordUserMetricsAction(UMA_TRAY_HELP);
-    tray_delegate->ShowHelp();
+    shell->system_tray_controller()->ShowHelp();
   } else if (sender == shutdown_button_) {
     shell->RecordUserMetricsAction(UMA_TRAY_SHUT_DOWN);
     tray_delegate->RequestShutdown();
   } else if (sender == lock_button_) {
     shell->RecordUserMetricsAction(UMA_TRAY_LOCK_SCREEN);
 #if defined(OS_CHROMEOS)
     chromeos::DBusThreadManager::Get()
         ->GetSessionManagerClient()
         ->RequestLockScreen();
 #endif
   } else {
     NOTREACHED();
   }
   date_view_->CloseSystemBubble();
 }
 
 void DateDefaultView::OnShutdownPolicyChanged(bool reboot_on_shutdown) {
   if (!shutdown_button_)
     return;
 
   shutdown_button_->SetTooltipText(l10n_util::GetStringUTF16(
       reboot_on_shutdown ? IDS_ASH_STATUS_TRAY_REBOOT
                          : IDS_ASH_STATUS_TRAY_SHUTDOWN));
 }
 
 }  // namespace ash