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

components/html_viewer/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/module_args/v8.gni")
 import("//mojo/public/mojo_application.gni")
 import("//testing/test.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 
@@ skipping 301 matching lines @@
     "run_all_unittests.cc",
   ]
   deps = [
     ":lib",
     ":pak",
     "//base/test:test_support",
     "//components/scheduler",
     "//gin",
     "//mojo/converters/input_events",
     "//testing/gtest:gtest",
-    "//third_party/mojo/src/mojo/edk/system",
     "//ui/base",
     "//ui/events",
     "//ui/events:test_support",
     "//ui/mojo/init",
   ]
 
+  if (use_chrome_edk) {
+    deps += [ "//mojo/edk/system" ]
+  } else {
+    deps += [ "//third_party/mojo/src/mojo/edk/system" ]
+  }
+
   if (is_android) {
     deps += [ ":build_unittest_assets" ]
     apk_asset_location = html_viewer_unittests_assets
   }
 }
 
 mojo_native_application("apptests") {
   output_name = "html_viewer_apptests"
   testonly = true
 
@@ skipping 21 matching lines @@
 
   data_deps = [
     ":html_viewer",
     "//components/mus",
   ]
 
   if (is_linux && !is_android) {
     data_deps += [ "//components/font_service" ]
   }
 }