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

mojo/runner/platform_handle_impl.cc

 // Copyright 2015 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/platform_handle/platform_handle.h"
+
 #include "third_party/mojo/src/mojo/edk/embedder/embedder.h"
 
 extern "C" {
 
 MojoResult MojoCreatePlatformHandleWrapper(MojoPlatformHandle platform_handle,
                                            MojoHandle* wrapper) {
   mojo::embedder::PlatformHandle platform_handle_wrapper(platform_handle);
   mojo::embedder::ScopedPlatformHandle scoped_platform_handle(
       platform_handle_wrapper);
   return mojo::embedder::CreatePlatformHandleWrapper(
@@ skipping 13 matching lines @@
   *platform_handle = scoped_platform_handle.release().fd;
 #elif defined(OS_WIN)
   *platform_handle = scoped_platform_handle.release().handle;
 #else
 #error "Platform not yet supported."
 #endif
   return MOJO_RESULT_OK;
 }
 
 }  // extern "C"