Added support for enabling GCD, or not, at build time.

remoting/app_remoting_webapp_build.gypi

 # 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.
 
 {
   'includes': [
     'remoting_version.gypi',
     'remoting_locales.gypi',
     'remoting_options.gypi',
     'remoting_webapp_files.gypi',
@@ skipping 127 matching lines @@
           '<(DEPTH)/remoting/webapp/app_remoting',
           '<@(remoting_app_id)',
           '--app_name',
           '<(remoting_app_name)',
           '--app_description',
           '<(remoting_app_description)',
           '--app_capabilities',
           '>@(_app_capabilities)',
           '--service_environment',
           '<@(ar_service_environment)',
+          '--use_gcd', '<(remoting_use_gcd)',

[Sergey Ulanov, 2015/03/25 18:56:43]

I don't think we need this for app remoting. They don't use directory and won't
be using GCD.

[John Williams, 2015/03/25 20:32:19]

Done.

         ],
       },
       {
         'action_name': 'Build ">(ar_app_name)" main.html',
         'inputs': [
           '<(DEPTH)/remoting/webapp/build-html.py',
           '<(ar_main_template)',
           '<@(ar_main_template_files)',
         ],
         'outputs': [
@@ skipping 73 matching lines @@
         # rather than using the extension id.
         # This is only done for Dev apps because the app-id for Release apps
         # *must* match the extension id.
         'variables': {
           'remoting_app_id': ['--appid', '>(_app_id)'],
         },
       }],
     ],  # conditions
   },  # target_defaults
 }