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

ui/gfx/compositor/debug_utils.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_DEBUG_UTILS_H_
-#define UI_GFX_COMPOSITOR_DEBUG_UTILS_H_
-#pragma once
-
-#ifndef NDEBUG
-
-#include "ui/gfx/compositor/compositor_export.h"
-
-namespace gfx {
-class Point;
-}
-
-namespace ui {
-
-class Layer;
-
-// Log the layer hierarchy. Mark layers which contain |mouse_location| with '*'.
-COMPOSITOR_EXPORT void PrintLayerHierarchy(const Layer* layer,
-                                           gfx::Point mouse_location);
-
-} // namespace ui
-
-#endif // NDEBUG
-
-#endif  // UI_GFX_COMPOSITOR_DEBUG_UTILS_H_