[Chrome OS MD] Draw a 1px separator between 2 tray items

ash/common/system/chromeos/virtual_keyboard/virtual_keyboard_tray.h

Index: ash/common/system/chromeos/virtual_keyboard/virtual_keyboard_tray.h
diff --git a/ash/common/system/chromeos/virtual_keyboard/virtual_keyboard_tray.h b/ash/common/system/chromeos/virtual_keyboard/virtual_keyboard_tray.h
index 04847be48ca6e4ee0f29d0bea72f41dc253ebba7..157b5a722d28bb9a604eec1247223a57412d5774 100644
--- a/ash/common/system/chromeos/virtual_keyboard/virtual_keyboard_tray.h
+++ b/ash/common/system/chromeos/virtual_keyboard/virtual_keyboard_tray.h
@@ -15,13 +15,16 @@ class ImageView;
 }
 
 namespace ash {
+class LogoutButtonTray;

[James Cook, 2016/08/09 00:25:17]

not needed

[yiyix, 2016/08/11 01:23:18]

It is from the 1st approach. I forget to clean it. Thanks.

+class WmShelfObserver;
 
 // TODO(sky): make this visible on non-chromeos platforms.
 class VirtualKeyboardTray : public TrayBackgroundView,
                             public KeyboardUIObserver,
                             public keyboard::KeyboardControllerObserver {
  public:
-  explicit VirtualKeyboardTray(WmShelf* wm_shelf);
+  explicit VirtualKeyboardTray(WmShelf* wm_shelf,

[James Cook, 2016/08/09 00:25:17]

no explicit

[yiyix, 2016/08/11 01:23:18]

Done.

+                               WmShelfObserver* wm_shelf_observer);
   ~VirtualKeyboardTray() override;
 
   // TrayBackgroundView: