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

mojo/edk/js/drain_data.cc

Index: mojo/edk/js/drain_data.cc
diff --git a/third_party/mojo/src/mojo/edk/js/drain_data.cc b/mojo/edk/js/drain_data.cc
similarity index 99%
copy from third_party/mojo/src/mojo/edk/js/drain_data.cc
copy to mojo/edk/js/drain_data.cc
index 0667c64ca1b3b798af91d958b6aca8c58ee8501d..d8fa0917cf304e7135b50734498bc328e0ad6cc3 100644
--- a/third_party/mojo/src/mojo/edk/js/drain_data.cc
+++ b/mojo/edk/js/drain_data.cc
@@ -13,7 +13,7 @@
 #include "mojo/public/cpp/system/core.h"
 
 namespace mojo {
-namespace js {
+namespace edk {
 
 DrainData::DrainData(v8::Isolate* isolate, mojo::Handle handle)
     : isolate_(isolate),
@@ -127,5 +127,5 @@ void DrainData::DeliverData(MojoResult result) {
   delete this;
 }
 
-}  // namespace js
+}  // namespace edk
 }  // namespace mojo