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

mojo/edk/embedder/platform_channel_pair_posix.cc

Index: mojo/edk/embedder/platform_channel_pair_posix.cc
diff --git a/third_party/mojo/src/mojo/edk/embedder/platform_channel_pair_posix.cc b/mojo/edk/embedder/platform_channel_pair_posix.cc
similarity index 95%
copy from third_party/mojo/src/mojo/edk/embedder/platform_channel_pair_posix.cc
copy to mojo/edk/embedder/platform_channel_pair_posix.cc
index 91dfe6b9454cefc75bc6729482039c3e8b82d909..8cdac366cc985a13ce80130eaa93fa2ac1c1de1e 100644
--- a/third_party/mojo/src/mojo/edk/embedder/platform_channel_pair_posix.cc
+++ b/mojo/edk/embedder/platform_channel_pair_posix.cc
@@ -2,7 +2,7 @@
 // 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_pair.h"
+#include "mojo/edk/embedder/platform_channel_pair.h"
 
 #include <fcntl.h>
 #include <sys/socket.h>
@@ -14,10 +14,10 @@
 #include "base/posix/global_descriptors.h"
 #include "base/strings/string_number_conversions.h"
 #include "build/build_config.h"
-#include "third_party/mojo/src/mojo/edk/embedder/platform_handle.h"
+#include "mojo/edk/embedder/platform_handle.h"
 
 namespace mojo {
-namespace embedder {
+namespace edk {
 
 namespace {
 
@@ -107,5 +107,5 @@ void PlatformChannelPair::PrepareToPassClientHandleToChildProcess(
                                   base::IntToString(target_fd));
 }
 
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo