Add a Mojo EDK for Chrome that uses one OS pipe per message pipe.

build/config/features.gni

 # 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.
 
 # This file contains Chrome-feature-related build flags (see ui.gni for
 # UI-related ones). These should theoretically be moved to the build files of
 # the features themselves.
 #
 # However, today we have many "bad" dependencies on some of these flags from,
 # e.g. base, so they need to be global to match the GYP configuration. Also,
@@ skipping 103 matching lines @@
   } else if (is_ios) {
     safe_browsing_mode = 0
   } else {
     safe_browsing_mode = 1
   }
 
   # Set to true make a build that disables activation of field trial tests
   # specified in testing/variations/fieldtrial_testing_config_*.json.
   # Note: this setting is ignored if is_chrome_branded.
   fieldtrial_testing_like_official_build = is_chrome_branded
+
+  # Use Chrome's implementation of the Mojo EDK located in src/mojo/edk instead
+  # of the one in src/third_party/mojo/src/mojo/edk
+  use_chrome_edk = false
 }
 
 # Additional dependent variables -----------------------------------------------
 
 # Set the version of CLD.
 #   1: (DEPRECATED! See http://crbug.com/528305 for info) Use only CLD1.
 #   2: Use only CLD2.
 cld_version = 2
 
 if (is_android || is_ios) {
@@ skipping 72 matching lines @@
 # system).
 # TODO(GYP) also require !embedded to enable.
 use_gconf = is_linux && !is_chromeos
 
 # Whether to back up data before sync.
 enable_pre_sync_backup = is_win || is_mac || (is_linux && !is_chromeos)
 
 # Enable WebVR support by default on Android
 # Still requires command line flag to access API
 enable_webvr = is_android