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

mojo/edk/embedder/platform_channel_utils_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 "third_party/mojo/src/mojo/edk/embedder/platform_channel_utils_posix.h"
+#include "mojo/edk/embedder/platform_channel_utils_posix.h"
 
 #include <sys/socket.h>
 #include <sys/uio.h>
 #include <unistd.h>
 
 #include "base/logging.h"
 #include "base/posix/eintr_wrapper.h"
 #include "build/build_config.h"
 
 namespace mojo {
-namespace embedder {
+namespace edk {
 
 // On Linux, |SIGPIPE| is suppressed by passing |MSG_NOSIGNAL| to
 // |send()|/|sendmsg()|. (There is no way of suppressing |SIGPIPE| on
 // |write()|/|writev().) On Mac, |SIGPIPE| is suppressed by setting the
 // |SO_NOSIGPIPE| option on the socket.
 //
 // Performance notes:
 //  - On Linux, we have to use |send()|/|sendmsg()| rather than
 //    |write()|/|writev()| in order to suppress |SIGPIPE|. This is okay, since
 //    |send()| is (slightly) faster than |write()| (!), while |sendmsg()| is
@@ skipping 148 matching lines @@
       for (size_t i = 0; i < num_fds; i++) {
         platform_handles->push_back(PlatformHandle(fds[i]));
         DCHECK(platform_handles->back().is_valid());
       }
     }
   }
 
   return result;
 }
 
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo