Support SystemTrayDelegate::ShowPowerSettings() in mustash

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"
@@ skipping 19 matching lines @@
 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();
+    if (PowerStatus::Get()->IsBatteryPresent())

[James Cook, 2016/09/27 23:23:13]

I'm unsure if we still need this check (I moved it here from
SystemTrayDelegateChromeos). It wasn't clear to me if it made sense to show the
settings if you didn't have a battery.

[michaelpg, 2016/09/28 23:09:15]

We shouldn't show the *notification* if there isn't a battery. I believe that's
already the case from the power settings proto. So this check isn't needed in
the notification itself.

[James Cook, 2016/09/29 15:28:29]

Removed the if().

+      WmShell::Get()->system_tray_delegate()->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