Implement all system menu title row buttons for Ash MD

ash/common/system/tray/tray_utils.cc

Index: ash/common/system/tray/tray_utils.cc
diff --git a/ash/common/system/tray/tray_utils.cc b/ash/common/system/tray/tray_utils.cc
index d7c9dd21669267c0b4ceb8774f2994b59b070847..c427e654b3bdf2d90e360ccc1a0aca10461bb139 100644
--- a/ash/common/system/tray/tray_utils.cc
+++ b/ash/common/system/tray/tray_utils.cc
@@ -5,9 +5,11 @@
 #include "ash/common/system/tray/tray_utils.h"
 
 #include "ash/common/material_design/material_design_controller.h"
+#include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/wm_shelf_util.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/tray_item_view.h"
+#include "ash/common/wm_shell.h"
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/gfx/font_list.h"
 #include "ui/gfx/geometry/vector2d.h"
@@ -86,4 +88,13 @@ void GetAccessibleLabelFromDescendantViews(
     GetAccessibleLabelFromDescendantViews(view->child_at(i), out_labels);
 }
 
+bool CanOpenWebUISettings(LoginStatus status) {
+  // TODO(tdanderson): Consider moving this into WmShell, or introduce a
+  // CanShowSettings() method in each delegate type that has a
+  // ShowSettings() method.
+  return status != LoginStatus::NOT_LOGGED_IN &&
+         status != LoginStatus::LOCKED &&
+         !WmShell::Get()->GetSessionStateDelegate()->IsInSecondaryLoginScreen();
+}
+
 }  // namespace ash