Move default_host from LoginDisplayHostImpl to LoginDisplayHost.

chrome/chrome_browser_chromeos.gypi

 # 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': {
     # These files lists are shared with the GN build.
     'browser_chromeos_sources': [
         # All .cc, .h, .m, and .mm files under browser/chromeos, except for tests
@@ skipping 603 matching lines @@
         'browser/chromeos/login/ui/input_events_blocker.h',
         'browser/chromeos/login/ui/keyboard_driven_oobe_key_handler.cc',
         'browser/chromeos/login/ui/keyboard_driven_oobe_key_handler.h',
         'browser/chromeos/login/ui/lock_window.cc',
         'browser/chromeos/login/ui/lock_window.h',
         'browser/chromeos/login/ui/lock_window_aura.cc',
         'browser/chromeos/login/ui/lock_window_aura.h',
         'browser/chromeos/login/ui/login_display.cc',
         'browser/chromeos/login/ui/login_display.h',
         'browser/chromeos/login/ui/login_display_host.h',
+        'browser/chromeos/login/ui/login_display_host.cc',
         'browser/chromeos/login/ui/login_display_host_impl.cc',
         'browser/chromeos/login/ui/login_display_host_impl.h',
         'browser/chromeos/login/ui/login_web_dialog.cc',
         'browser/chromeos/login/ui/login_web_dialog.h',
         'browser/chromeos/login/ui/models/user_board_model.cc',
         'browser/chromeos/login/ui/models/user_board_model.h',
         'browser/chromeos/login/ui/oobe_display.h',
         'browser/chromeos/login/ui/proxy_settings_dialog.cc',
         'browser/chromeos/login/ui/simple_web_view_dialog.cc',
         'browser/chromeos/login/ui/simple_web_view_dialog.h',
@@ skipping 672 matching lines @@
         'browser/chromeos/attestation/attestation_signed_data.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/attestation',
         'proto_out_dir': 'chrome/browser/chromeos/attestation',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }