ForceBorderVisible  213 ash/system/user/tray_user.cc   void ForceBorderVisible(bool show);
ForceBorderVisible 1024 ash/system/user/tray_user.cc   owner_->ForceBorderVisible(true);
ForceBorderVisible 1028 ash/system/user/tray_user.cc   owner_->ForceBorderVisible(false);