Remove remote tree host and some related input and metro_driver code

chrome/chrome_browser_ui.gypi

 # Copyright 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': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 540 matching lines @@
       'browser/ui/ash/launcher/chrome_launcher_app_menu_item.cc',
       'browser/ui/ash/launcher/chrome_launcher_app_menu_item.h',
       'browser/ui/ash/launcher/chrome_launcher_app_menu_item_browser.cc',
       'browser/ui/ash/launcher/chrome_launcher_app_menu_item_browser.h',
       'browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.cc',
       'browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.h',
       'browser/ui/ash/launcher/chrome_launcher_app_menu_item_v2app.cc',
       'browser/ui/ash/launcher/chrome_launcher_app_menu_item_v2app.h',
       'browser/ui/ash/launcher/chrome_launcher_controller.cc',
       'browser/ui/ash/launcher/chrome_launcher_controller.h',
-      'browser/ui/ash/launcher/chrome_launcher_controller_chromeos.cc',
-      'browser/ui/ash/launcher/chrome_launcher_controller_win.cc',
       'browser/ui/ash/launcher/launcher_app_tab_helper.cc',
       'browser/ui/ash/launcher/launcher_app_tab_helper.h',
       'browser/ui/ash/launcher/launcher_application_menu_item_model.cc',
       'browser/ui/ash/launcher/launcher_application_menu_item_model.h',
       'browser/ui/ash/launcher/launcher_context_menu.cc',
       'browser/ui/ash/launcher/launcher_context_menu.h',
       'browser/ui/ash/launcher/launcher_favicon_loader.cc',
       'browser/ui/ash/launcher/launcher_favicon_loader.h',
       'browser/ui/ash/launcher/launcher_item_controller.cc',
       'browser/ui/ash/launcher/launcher_item_controller.h',
@@ skipping 2737 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }