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

mojo/edk/system/handle_table.h

Index: mojo/edk/system/handle_table.h
diff --git a/third_party/mojo/src/mojo/edk/system/handle_table.h b/mojo/edk/system/handle_table.h
similarity index 99%
copy from third_party/mojo/src/mojo/edk/system/handle_table.h
copy to mojo/edk/system/handle_table.h
index 83c7208924bfe2083cf168d1996d31eea8fdea3a..de5ac05174be0f32fbe1a0733dde7c2888e4f698 100644
--- a/third_party/mojo/src/mojo/edk/system/handle_table.h
+++ b/mojo/edk/system/handle_table.h
@@ -15,7 +15,7 @@
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
-namespace system {
+namespace edk {
 
 class Core;
 class Dispatcher;
@@ -138,7 +138,7 @@ class MOJO_SYSTEM_IMPL_EXPORT HandleTable {
   MOJO_DISALLOW_COPY_AND_ASSIGN(HandleTable);
 };
 
-}  // namespace system
+}  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_HANDLE_TABLE_H_