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

mojo/edk/embedder/entrypoints.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/edk/embedder/embedder_internal.h"
 #include "mojo/edk/system/core.h"
 #include "mojo/public/c/system/buffer.h"
 #include "mojo/public/c/system/data_pipe.h"
 #include "mojo/public/c/system/functions.h"
 #include "mojo/public/c/system/message_pipe.h"
 
-using mojo::embedder::internal::g_core;
-using mojo::system::MakeUserPointer;
+using mojo::edk::internal::g_core;
+using mojo::edk::MakeUserPointer;
 
 // Definitions of the system functions.
 extern "C" {
 MojoTimeTicks MojoGetTimeTicksNow() {
   return g_core->GetTimeTicksNow();
 }
 
 MojoResult MojoClose(MojoHandle handle) {
   return g_core->Close(handle);
 }
@@ skipping 122 matching lines @@
                          MojoMapBufferFlags flags) {
   return g_core->MapBuffer(buffer_handle, offset, num_bytes,
                            MakeUserPointer(buffer), flags);
 }
 
 MojoResult MojoUnmapBuffer(void* buffer) {
   return g_core->UnmapBuffer(MakeUserPointer(buffer));
 }
 
 }  // extern "C"