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

mojo/edk/embedder/platform_handle_utils_posix.cc

Index: mojo/edk/embedder/platform_handle_utils_posix.cc
diff --git a/third_party/mojo/src/mojo/edk/embedder/platform_handle_utils_posix.cc b/mojo/edk/embedder/platform_handle_utils_posix.cc
similarity index 82%
copy from third_party/mojo/src/mojo/edk/embedder/platform_handle_utils_posix.cc
copy to mojo/edk/embedder/platform_handle_utils_posix.cc
index 2f03def8d6f68a5131091d3e208b40451626e3b6..1f6ecce9d09165330472b23f4fc4092d11e8f5b6 100644
--- a/third_party/mojo/src/mojo/edk/embedder/platform_handle_utils_posix.cc
+++ b/mojo/edk/embedder/platform_handle_utils_posix.cc
@@ -2,14 +2,14 @@
 // 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_handle_utils.h"
+#include "mojo/edk/embedder/platform_handle_utils.h"
 
 #include <unistd.h>
 
 #include "base/logging.h"
 
 namespace mojo {
-namespace embedder {
+namespace edk {
 
 ScopedPlatformHandle DuplicatePlatformHandle(PlatformHandle platform_handle) {
   DCHECK(platform_handle.is_valid());
@@ -18,5 +18,5 @@ ScopedPlatformHandle DuplicatePlatformHandle(PlatformHandle platform_handle) {
   return ScopedPlatformHandle(PlatformHandle(dup(platform_handle.fd)));
 }
 
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo