Remove remote tree host and some related input and metro_driver code

ui/base/ime/ui_base_ime.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 89 matching lines @@
         'input_method_win.h',
         'linux/fake_input_method_context.cc',
         'linux/fake_input_method_context.h',
         'linux/fake_input_method_context_factory.cc',
         'linux/fake_input_method_context_factory.h',
         'linux/linux_input_method_context.h',
         'linux/linux_input_method_context_factory.cc',
         'linux/linux_input_method_context_factory.h',
         'mock_input_method.cc',
         'mock_input_method.h',
-        'remote_input_method_delegate_win.h',
-        'remote_input_method_win.cc',
-        'remote_input_method_win.h',
         'text_input_client.cc',
         'text_input_client.h',
         'text_input_type.h',
         'ui_base_ime_export.h',
         'win/imm32_manager.cc',
         'win/imm32_manager.h',
         'win/tsf_input_scope.cc',
         'win/tsf_input_scope.h',
       ],
       'conditions': [
@@ skipping 54 matching lines @@
         ['use_x11==0', {
           'sources!': [
             'composition_text_util_pango.cc',
             'composition_text_util_pango.h',
           ],
         }],
       ],
     },
   ],
 }