Revert of Remove remote tree host and some related input and metro_driver code

ash/ash.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # These files lists are shared with the GN build.
     'ash_sources': [
       'accelerators/accelerator_commands.cc',
@@ skipping 129 matching lines @@
       'frame/frame_border_hit_test_controller.cc',
       'frame/frame_border_hit_test_controller.h',
       'frame/header_painter.h',
       'frame/header_painter_util.cc',
       'frame/header_painter_util.h',
       'gpu_support.h',
       'gpu_support_stub.cc',
       'gpu_support_stub.h',
       'high_contrast/high_contrast_controller.cc',
       'high_contrast/high_contrast_controller.h',
+      'host/ash_remote_window_tree_host_win.cc',
+      'host/ash_remote_window_tree_host_win.h',
       'host/ash_window_tree_host.cc',
       'host/ash_window_tree_host.h',
       'host/ash_window_tree_host_init_params.cc',
       'host/ash_window_tree_host_init_params.h',
       'host/ash_window_tree_host_ozone.cc',
       'host/ash_window_tree_host_unified.cc',
       'host/ash_window_tree_host_unified.h',
       'host/ash_window_tree_host_win.cc',
       'host/ash_window_tree_host_x11.cc',
       'host/ash_window_tree_host_x11.h',
@@ skipping 1204 matching lines @@
                   '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
                 ],
               }
             ],
           ],
         },
       ],
     }],
   ],
 }