Revert of Start of display management for mus

ui/gfx/display_finder.h

-// Copyright 2016 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_DISPLAY_FINDER_H_
-#define UI_GFX_DISPLAY_FINDER_H_
-
-#include <vector>
-
-#include "ui/gfx/gfx_export.h"
-
-namespace gfx {
-
-class Display;
-class Point;
-class Rect;
-
-// Returns the display in |displays| closest to |point|.
-GFX_EXPORT const Display* FindDisplayNearestPoint(
-    const std::vector<Display>& displays,
-    const Point& point);
-
-// Returns the display in |displays| with the biggest intersection of |rect|.
-// If none of the displays intersect |rect| null is returned.
-GFX_EXPORT const Display* FindDisplayWithBiggestIntersection(
-    const std::vector<Display>& displays,
-    const Rect& rect);
-
-}  // namespace gfx
-
-#endif  // UI_GFX_DISPLAY_FINDER_H_