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

mojo/edk/system/message_in_transit_queue.h

Index: mojo/edk/system/message_in_transit_queue.h
diff --git a/third_party/mojo/src/mojo/edk/system/message_in_transit_queue.h b/mojo/edk/system/message_in_transit_queue.h
similarity index 77%
copy from third_party/mojo/src/mojo/edk/system/message_in_transit_queue.h
copy to mojo/edk/system/message_in_transit_queue.h
index c497341495f30c785e4d166c2f9512023acedf51..4a054900056b6fa17d379ab9472bd857c830d6c2 100644
--- a/third_party/mojo/src/mojo/edk/system/message_in_transit_queue.h
+++ b/mojo/edk/system/message_in_transit_queue.h
@@ -2,18 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef THIRD_PARTY_MOJO_SRC_MOJO_EDK_SYSTEM_MESSAGE_IN_TRANSIT_QUEUE_H_
-#define THIRD_PARTY_MOJO_SRC_MOJO_EDK_SYSTEM_MESSAGE_IN_TRANSIT_QUEUE_H_
+#ifndef MOJO_EDK_SYSTEM_MESSAGE_IN_TRANSIT_QUEUE_H_
+#define MOJO_EDK_SYSTEM_MESSAGE_IN_TRANSIT_QUEUE_H_
 
 #include <deque>
 
 #include "base/memory/scoped_ptr.h"
+#include "mojo/edk/system/message_in_transit.h"
+#include "mojo/edk/system/system_impl_export.h"
 #include "mojo/public/cpp/system/macros.h"
-#include "third_party/mojo/src/mojo/edk/system/message_in_transit.h"
-#include "third_party/mojo/src/mojo/edk/system/system_impl_export.h"
 
 namespace mojo {
-namespace system {
+namespace edk {
 
 // A simple queue for |MessageInTransit|s (that owns its messages).
 // This class is not thread-safe.
@@ -56,7 +56,7 @@ class MOJO_SYSTEM_IMPL_EXPORT MessageInTransitQueue {
   MOJO_DISALLOW_COPY_AND_ASSIGN(MessageInTransitQueue);
 };
 
-}  // namespace system
+}  // namespace edk
 }  // namespace mojo
 
-#endif  // THIRD_PARTY_MOJO_SRC_MOJO_EDK_SYSTEM_MESSAGE_IN_TRANSIT_QUEUE_H_
+#endif  // MOJO_EDK_SYSTEM_MESSAGE_IN_TRANSIT_QUEUE_H_