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

device/BUILD.gn

 # Copyright 2015 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/config/features.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")  # For generate_jni().
 }
@@ skipping 51 matching lines @@
   deps = [
     "//base/test:test_support",
     "//device/battery",
     "//device/battery:mojo_bindings",
     "//device/bluetooth",
     "//device/nfc",
     "//mojo/environment:chromium",
     "//net",
     "//testing/gmock",
     "//testing/gtest",
-    "//third_party/mojo/src/mojo/edk/system",
     "//third_party/mojo/src/mojo/public/cpp/bindings",
     "//url",
   ]
 
+  if (use_chrome_edk) {
+    deps += [ "//mojo/edk/system" ]
+  } else {
+    deps += [ "//third_party/mojo/src/mojo/edk/system" ]
+  }
+
   if (!is_linux_without_dbus && !is_chromeos) {
     sources += [ "battery/battery_status_manager_linux_unittest.cc" ]
   }
 
   # HID and Serial:
   # Android doesn't compile.
   # Linux, requires udev.
   if (!is_linux_without_udev && !is_android) {
     sources += [
       "hid/hid_connection_unittest.cc",
@@ skipping 92 matching lines @@
   }
 
   android_library("bluetooth_test_java") {
     java_files = bluetooth_java_sources_needing_jni
     deps = [
       "//base:base_java",
       "//device/bluetooth:java",
     ]
   }
 }