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

mojo/edk/test/test_support_impl.cc

Index: mojo/edk/test/test_support_impl.cc
diff --git a/third_party/mojo/src/mojo/edk/test/test_support_impl.cc b/mojo/edk/test/test_support_impl.cc
similarity index 96%
copy from third_party/mojo/src/mojo/edk/test/test_support_impl.cc
copy to mojo/edk/test/test_support_impl.cc
index e3cd762177131e2d125ed098d6e9d6d27b4fe65d..c91fcf37272f6212b9ae9f6ff0d8842b76206bd0 100644
--- a/third_party/mojo/src/mojo/edk/test/test_support_impl.cc
+++ b/mojo/edk/test/test_support_impl.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/test/test_support_impl.h"
+#include "mojo/edk/test/test_support_impl.h"
 
 #include <stdlib.h>
 #include <string.h>
@@ -20,6 +20,7 @@
 #include "base/test/perf_log.h"
 
 namespace mojo {
+namespace edk {
 namespace test {
 namespace {
 
@@ -78,4 +79,5 @@ char** TestSupportImpl::EnumerateSourceRootRelativeDirectory(
 }
 
 }  // namespace test
+}  // namespace edk
 }  // namespace mojo