chromeos: Move files in //ash/common to //ash, part 2

ash/common/wm/root_window_finder.cc

-// 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.
-
-#include "ash/common/wm/root_window_finder.h"
-
-#include "ash/common/wm_window.h"
-#include "ash/root_window_controller.h"
-#include "ash/shell.h"
-#include "ui/display/display.h"
-#include "ui/display/screen.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/rect.h"
-
-namespace ash {
-namespace wm {
-
-WmWindow* GetRootWindowAt(const gfx::Point& point) {
-  const display::Display& display =
-      display::Screen::GetScreen()->GetDisplayNearestPoint(point);
-  DCHECK(display.is_valid());
-  RootWindowController* root_window_controller =
-      Shell::GetRootWindowControllerWithDisplayId(display.id());
-  return root_window_controller ? root_window_controller->GetWindow() : nullptr;
-}
-
-WmWindow* GetRootWindowMatching(const gfx::Rect& rect) {
-  const display::Display& display =
-      display::Screen::GetScreen()->GetDisplayMatching(rect);
-  RootWindowController* root_window_controller =
-      Shell::GetRootWindowControllerWithDisplayId(display.id());
-  return root_window_controller ? root_window_controller->GetWindow() : nullptr;
-}
-
-}  // namespace wm
-}  // namespace ash