Revert of Remove remote tree host and some related input and metro_driver code

win8/delegate_execute/delegate_execute.gyp

 # 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': {
     'chromium_code': 1,
   },
   'includes': [
     '../../build/util/version.gypi',
     '../../build/win_precompile.gypi',
@@ skipping 55 matching lines @@
         'delegate_execute_util.h',
         'resource.h',
         '<(SHARED_INTERMEDIATE_DIR)/delegate_execute/delegate_execute_exe_version.rc',
       ],
       'msvs_settings': {
         'VCLinkerTool': {
           'SubSystem': '2',  # Set /SUBSYSTEM:WINDOWS
         },
       },
       'conditions': [
+        ['use_aura==1', {
+          'dependencies': [
+            '../win8.gyp:metro_viewer_constants',
+          ],
+        }],
         ['branding!="Chrome"', {
           'dependencies!': [
             '../../google_update/google_update.gyp:google_update',
           ],
         }],
       ],
     },
     {
       # GN version: //win8/delegate_execute:delegate_execute_unittests
       'target_name': 'delegate_execute_unittests',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:run_all_unittests',
         '../../testing/gtest.gyp:gtest',
       ],
       'sources': [
         'delegate_execute_util.cc',
         'delegate_execute_util.h',
         'delegate_execute_util_unittest.cc',
       ],
     },
   ],
 }