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

mojo/edk/system/test_utils.cc

Index: mojo/edk/system/test_utils.cc
diff --git a/third_party/mojo/src/mojo/edk/system/test_utils.cc b/mojo/edk/system/test_utils.cc
similarity index 88%
copy from third_party/mojo/src/mojo/edk/system/test_utils.cc
copy to mojo/edk/system/test_utils.cc
index cb012e87396c5c8025c043a7f1cea36578c6859c..49e346b895cb62cc76d6468da51f81d460e752bb 100644
--- a/third_party/mojo/src/mojo/edk/system/test_utils.cc
+++ b/mojo/edk/system/test_utils.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "third_party/mojo/src/mojo/edk/system/test_utils.h"
+#include "mojo/edk/system/test_utils.h"
 
 #include <limits>
 
@@ -12,7 +12,7 @@
 #include "build/build_config.h"
 
 namespace mojo {
-namespace system {
+namespace edk {
 namespace test {
 
 MojoDeadline DeadlineFromMilliseconds(unsigned milliseconds) {
@@ -69,6 +69,15 @@ MojoDeadline Stopwatch::Elapsed() {
   return static_cast<MojoDeadline>(result);
 }
 
+
+MojoSystemTest::MojoSystemTest()
+    : test_io_thread_(base::TestIOThread::kAutoStart),
+      ipc_support_(test_io_thread_.task_runner()) {
+}
+
+MojoSystemTest::~MojoSystemTest() {
+}
+
 }  // namespace test
-}  // namespace system
+}  // namespace edk
 }  // namespace mojo