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

mojo/edk/embedder/simple_platform_shared_buffer_posix.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 <stdio.h>     // For |fileno()|.
 #include <sys/mman.h>  // For |mmap()|/|munmap()|.
 #include <sys/stat.h>
@@ skipping 10 matching lines @@
 #include "base/sys_info.h"
 #include "base/threading/thread_restrictions.h"
 #include "mojo/edk/embedder/platform_handle.h"
 
 // We assume that |size_t| and |off_t| (type for |ftruncate()|) fits in a
 // |uint64_t|.
 static_assert(sizeof(size_t) <= sizeof(uint64_t), "size_t too big");
 static_assert(sizeof(off_t) <= sizeof(uint64_t), "off_t too big");
 
 namespace mojo {
-namespace embedder {
+namespace edk {
 
 // SimplePlatformSharedBuffer --------------------------------------------------
 
 // The implementation for android uses ashmem to generate the file descriptor
 // for the shared memory. See simple_platform_shared_buffer_android.cc
 #if !defined(OS_ANDROID)
 
 bool SimplePlatformSharedBuffer::Init() {
   DCHECK(!handle_.is_valid());
 
@@ skipping 105 matching lines @@
       base, length, real_base, real_length));
 }
 
 // SimplePlatformSharedBufferMapping -------------------------------------------
 
 void SimplePlatformSharedBufferMapping::Unmap() {
   int result = munmap(real_base_, real_length_);
   PLOG_IF(ERROR, result != 0) << "munmap";
 }
 
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo