Add desktop vs. ash context to ui_controls

ui/aura/ui_controls_aura.h

Index: ui/aura/ui_controls_aura.h
diff --git a/ui/aura/ui_controls_aura.h b/ui/aura/ui_controls_aura.h
deleted file mode 100644
index 4007430b3f2ba574892da77fe3d49d63fe827233..0000000000000000000000000000000000000000
--- a/ui/aura/ui_controls_aura.h
+++ /dev/null
@@ -1,22 +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 UI_AURA_UI_CONTROLS_AURA_H_
-#define UI_AURA_UI_CONTROLS_AURA_H_
-
-#include "ui/aura/aura_export.h"
-
-namespace ui_controls {
-class UIControlsAura;
-}
-
-namespace aura {
-class RootWindow;
-
-AURA_EXPORT ui_controls::UIControlsAura* CreateUIControlsAura(
-    RootWindow* root_window);
-
-}  // namespace aura
-
-#endif // UI_AURA_UI_CONTROLS_AURA_H_