Moves FindDisplayIndexContainingPoint into display

ash/display/unified_mouse_warp_controller.cc

 // Copyright 2015 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/display/unified_mouse_warp_controller.h"
 
 #include <cmath>
 
 #include "ash/display/display_util.h"
 #include "ash/display/mirror_window_controller.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/host/ash_window_tree_host.h"
 #include "ash/shell.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/layout.h"
+#include "ui/display/display_finder.h"
 #include "ui/display/display_layout.h"
 #include "ui/display/manager/display_manager.h"
 #include "ui/display/manager/display_manager_utilities.h"
 #include "ui/display/screen.h"
 #include "ui/events/event_utils.h"
 #include "ui/wm/core/coordinate_conversion.h"
 
 namespace ash {
 
 namespace {
@@ skipping 138 matching lines @@
       in_first_edge ? display_list[0].id() : display_list[1].id();
   AshWindowTreeHost* target_ash_host =
       GetMirroringAshWindowTreeHostForDisplayId(
           in_first_edge ? display_list[1].id() : display_list[0].id());
   MoveCursorTo(target_ash_host, point_in_unified_host,
                update_mouse_location_now);
   return true;
 }
 
 }  // namespace ash