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

mojo/edk/system/memory.cc

Index: mojo/edk/system/memory.cc
diff --git a/third_party/mojo/src/mojo/edk/system/memory.cc b/mojo/edk/system/memory.cc
similarity index 98%
copy from third_party/mojo/src/mojo/edk/system/memory.cc
copy to mojo/edk/system/memory.cc
index 0e3d9a9cb70a55cacc81ba7315dc6929e958e89f..2e8e7143fec4f83154bcfb7b9f930db9e5cb51c6 100644
--- a/third_party/mojo/src/mojo/edk/system/memory.cc
+++ b/mojo/edk/system/memory.cc
@@ -10,7 +10,7 @@
 #include "build/build_config.h"
 
 namespace mojo {
-namespace system {
+namespace edk {
 namespace internal {
 
 template <size_t alignment>
@@ -85,5 +85,5 @@ CheckUserPointerWithSize<8>(const void*, size_t);
 #endif
 
 }  // namespace internal
-}  // namespace system
+}  // namespace edk
 }  // namespace mojo