Rename the remaining usage of Monitor to Display

ash/monitor/secondary_monitor_view.h

Index: ash/monitor/secondary_monitor_view.h
diff --git a/ash/monitor/secondary_monitor_view.h b/ash/monitor/secondary_monitor_view.h
deleted file mode 100644
index cca03d2f40c73a318aa01ca33501d14a59f9ac5e..0000000000000000000000000000000000000000
--- a/ash/monitor/secondary_monitor_view.h
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef ASH_MONITOR_SECONDARY_MONITOR_VIEW_H_
-#define ASH_MONITOR_SECONDARY_MONITOR_VIEW_H_
-#pragma once
-
-namespace aura {
-class Window;
-}
-
-namespace views {
-class Widget;
-}
-
-namespace ash {
-
-// Creates the widget that hosts the static message displayed on the
-// secondary monitor.
-views::Widget* CreateSecondaryMonitorWidget(aura::Window* parent);
-
-}  // namespace ash
-
-#endif  // ASH_MONITOR_SECONDARY_MONITOR_VIEW_H_