Enable CursorManager::LockCursor to lock cursor visibility.

ash/wm/cursor_delegate.h

Index: ash/wm/cursor_delegate.h
diff --git a/ash/wm/cursor_delegate.h b/ash/wm/cursor_delegate.h
deleted file mode 100644
index 05d901f7e9f5171236d0ac6b1caabb335c9eab43..0000000000000000000000000000000000000000
--- a/ash/wm/cursor_delegate.h
+++ /dev/null
@@ -1,26 +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_WM_CURSOR_DELEGATE_H_
-#define ASH_WM_CURSOR_DELEGATE_H_
-
-#include "ash/ash_export.h"
-#include "ui/gfx/native_widget_types.h"
-
-namespace ash {
-
-// This interface is implmented by a platform specific object that changes
-// the cursor's image and visibility.
-class ASH_EXPORT CursorDelegate {
- public:
-  virtual void SetCursor(gfx::NativeCursor cursor) = 0;
-  virtual void ShowCursor(bool visible) = 0;
-
- protected:
-  virtual ~CursorDelegate() {};
-};
-
-}  // namespace aura
-
-#endif  // ASH_WM_CURSOR_DELEGATE_H_