Remove the extra separator appears beside overview tray

ash/common/system/chromeos/session/logout_button_tray.cc

Index: ash/common/system/chromeos/session/logout_button_tray.cc
diff --git a/ash/common/system/chromeos/session/logout_button_tray.cc b/ash/common/system/chromeos/session/logout_button_tray.cc
index 8e8fafa3eb52be46e5f301a2b286c91b7dce1023..4e5a763cfbb37e5cdfc7e34314dbe0e557e2bc5c 100644
--- a/ash/common/system/chromeos/session/logout_button_tray.cc
+++ b/ash/common/system/chromeos/session/logout_button_tray.cc
@@ -48,7 +48,7 @@ LogoutButtonTray::LogoutButtonTray(WmShelf* wm_shelf)
   button->AdjustFontSize(2);
   button_ = button;
 
-  // Since |logout_button_tray| has a red background and it is distinguished
+  // Since LogoutButtonTray has a red background and it is distinguished
   // by itself, no separator is needed on its right side.
   set_separator_visibility(false);
   tray_container()->AddChildView(button_);