Removing It2MeConfirmationDialogFactory

remoting/host/it2me/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//remoting/remoting_enable.gni")
 import("//remoting/remoting_locales.gni")
 import("//remoting/remoting_version.gni")
 
 if (is_win) {
   import("//remoting/host/predefines_win.gni")
 }
 if (is_mac) {
   import("//build/config/mac/rules.gni")
   import("//third_party/icu/config.gni")
 }
 
 source_set("common") {
   sources = [
-    "it2me_confirmation_dialog.cc",
     "it2me_confirmation_dialog.h",
     "it2me_confirmation_dialog_linux.cc",
     "it2me_confirmation_dialog_mac.mm",
     "it2me_confirmation_dialog_proxy.cc",
     "it2me_confirmation_dialog_proxy.h",
     "it2me_confirmation_dialog_win.cc",
     "it2me_host.cc",
     "it2me_host.h",
     "it2me_native_messaging_host.cc",
     "it2me_native_messaging_host.h",
@@ skipping 208 matching lines @@
       if (is_desktop_linux) {
         if (use_gtk3) {
           deps += [ "//build/config/linux/gtk3" ]
         } else {
           deps += [ "//build/config/linux/gtk2" ]
         }
       }
     }
   }
 }