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 94%
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 f7464bd6272476b024c87fe5d95ffd52d27d94ef..423b454a4581ab37e2e0d2c49ba656213cf8087e 100644
--- a/third_party/mojo/src/mojo/edk/system/message_in_transit_queue.h
+++ b/mojo/edk/system/message_in_transit_queue.h
@@ -13,7 +13,7 @@
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
-namespace system {
+namespace edk {
 
 // A simple queue for |MessageInTransit|s (that owns its messages).
 // This class is not thread-safe.
@@ -45,7 +45,7 @@ class MOJO_SYSTEM_IMPL_EXPORT MessageInTransitQueue {
 
   void Clear();
 
-  // Efficiently swaps contents with |*other|.
+  // Efficiently swaps contents with |*other|.S
   void Swap(MessageInTransitQueue* other);
 
  private:
@@ -56,7 +56,7 @@ class MOJO_SYSTEM_IMPL_EXPORT MessageInTransitQueue {
   MOJO_DISALLOW_COPY_AND_ASSIGN(MessageInTransitQueue);
 };
 
-}  // namespace system
+}  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_MESSAGE_IN_TRANSIT_QUEUE_H_