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

mojo/edk/system/waiter_test_utils.cc

Index: mojo/edk/system/waiter_test_utils.cc
diff --git a/third_party/mojo/src/mojo/edk/system/waiter_test_utils.cc b/mojo/edk/system/waiter_test_utils.cc
similarity index 98%
copy from third_party/mojo/src/mojo/edk/system/waiter_test_utils.cc
copy to mojo/edk/system/waiter_test_utils.cc
index b2cdd882bc801a2a768933c0d36d7faccc14c3b0..bd7f55eb73b501bcc38c41578984069f548c3b83 100644
--- a/third_party/mojo/src/mojo/edk/system/waiter_test_utils.cc
+++ b/mojo/edk/system/waiter_test_utils.cc
@@ -5,7 +5,7 @@
 #include "mojo/edk/system/waiter_test_utils.h"
 
 namespace mojo {
-namespace system {
+namespace edk {
 namespace test {
 
 SimpleWaiterThread::SimpleWaiterThread(MojoResult* result, uint32_t* context)
@@ -66,5 +66,5 @@ void WaiterThread::Run() {
 }
 
 }  // namespace test
-}  // namespace system
+}  // namespace edk
 }  // namespace mojo