Remove remote tree host and some related input and metro_driver code

ui/base/ui_base_tests.gyp

 # Copyright 2013 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,
   },
   'targets': [
     {
@@ skipping 59 matching lines @@
         'cocoa/nsview_additions_unittest.mm',
         'cocoa/three_part_image_unittest.mm',
         'cocoa/tracking_area_unittest.mm',
         'dragdrop/os_exchange_data_provider_aurax11_unittest.cc',
         'ime/candidate_window_unittest.cc',
         'ime/composition_text_unittest.cc',
         'ime/chromeos/character_composer_unittest.cc',
         'ime/composition_text_util_pango_unittest.cc',
         'ime/input_method_base_unittest.cc',
         'ime/input_method_chromeos_unittest.cc',
-        'ime/remote_input_method_win_unittest.cc',
         'ime/win/imm32_manager_unittest.cc',
         'ime/win/tsf_input_scope_unittest.cc',
         'models/list_model_unittest.cc',
         'models/list_selection_model_unittest.cc',
         'models/tree_node_model_unittest.cc',
         'resource/material_design/material_design_controller_unittest.cc',
         'test/data/resource.h',
         'test/test_clipboard_unittest.cc',
         'test/scoped_fake_nswindow_fullscreen_unittest.mm',
         'text/bytes_formatting_unittest.cc',
@@ skipping 239 matching lines @@
               'dependencies': [
                 '../../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }