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

mojo/edk/embedder/simple_platform_shared_buffer_android.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/simple_platform_shared_buffer.h"
 
 #include <stdint.h>
 #include <sys/mman.h>   // For |PROT_...|.
 #include <sys/types.h>  // For |off_t|.
 
@@ skipping 52 matching lines @@
     LOG(ERROR) << "Shared memory region has the wrong size";
     return false;
   }
 
   handle_ = platform_handle.Pass();
   return true;
 }
 
 }  // namespace embedder
 }  // namespace mojo