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

ash/common/system/chromeos/ime_menu/ime_menu_tray.cc

Index: ash/common/system/chromeos/ime_menu/ime_menu_tray.cc
diff --git a/ash/common/system/chromeos/ime_menu/ime_menu_tray.cc b/ash/common/system/chromeos/ime_menu/ime_menu_tray.cc
index e92e52875929e44c6e6d5f7e8053183274427d7f..7bf20481254358d2d0da8e2f10e14531c09aada2 100644
--- a/ash/common/system/chromeos/ime_menu/ime_menu_tray.cc
+++ b/ash/common/system/chromeos/ime_menu/ime_menu_tray.cc
@@ -35,8 +35,8 @@ class ImeMenuLabel : public views::Label {
 
 }  // namespace
 
-ImeMenuTray::ImeMenuTray(WmShelf* wm_shelf)
-    : TrayBackgroundView(wm_shelf), label_(new ImeMenuLabel()) {
+ImeMenuTray::ImeMenuTray(WmShelf* wm_shelf, ViewObserver* view_observer)
+    : TrayBackgroundView(wm_shelf, view_observer), label_(new ImeMenuLabel()) {
   SetupLabelForTray(label_);
   tray_container()->AddChildView(label_);
   SetContentsBackground();