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

mojo/edk/system/waiter_test_utils.h

Index: mojo/edk/system/waiter_test_utils.h
diff --git a/third_party/mojo/src/mojo/edk/system/waiter_test_utils.h b/mojo/edk/system/waiter_test_utils.h
similarity index 98%
copy from third_party/mojo/src/mojo/edk/system/waiter_test_utils.h
copy to mojo/edk/system/waiter_test_utils.h
index 350d87f286ab8ce692af76f62b2a00484767187b..a55d5073ff8329637b0f91e245436610777268fd 100644
--- a/third_party/mojo/src/mojo/edk/system/waiter_test_utils.h
+++ b/mojo/edk/system/waiter_test_utils.h
@@ -16,7 +16,7 @@
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
-namespace system {
+namespace edk {
 namespace test {
 
 // This is a very simple thread that has a |Waiter|, on which it waits
@@ -98,7 +98,7 @@ class WaiterThread : public base::SimpleThread {
 };
 
 }  // namespace test
-}  // namespace system
+}  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_WAITER_TEST_UTILS_H_