ui: Move compositor/ directory out of gfx/, up to ui/.

ui/compositor/layer_type.h

 // 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_GFX_COMPOSITOR_LAYER_TYPE_H_
-#define UI_GFX_COMPOSITOR_LAYER_TYPE_H_
+#ifndef UI_COMPOSITOR_LAYER_TYPE_H_
+#define UI_COMPOSITOR_LAYER_TYPE_H_
 #pragma once
 
 namespace ui {
 
 enum LayerType {
   // A layer that has no onscreen representation (note that its children will
   // still be drawn, though).
   LAYER_NOT_DRAWN = 0,
 
   // A layer that has a texture.
   LAYER_TEXTURED = 1,
 
   // A layer that's drawn as a single color.
   LAYER_SOLID_COLOR = 2,
 };
 
-}  // namespace
+}  // namespace ui
 
-#endif  // UI_GFX_COMPOSITOR_LAYER_TYPE_H_
+#endif  // UI_COMPOSITOR_LAYER_TYPE_H_