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

mojo/edk/embedder/platform_handle_utils_win.cc

Index: mojo/edk/embedder/platform_handle_utils_win.cc
diff --git a/third_party/mojo/src/mojo/edk/embedder/platform_handle_utils_win.cc b/mojo/edk/embedder/platform_handle_utils_win.cc
similarity index 94%
copy from third_party/mojo/src/mojo/edk/embedder/platform_handle_utils_win.cc
copy to mojo/edk/embedder/platform_handle_utils_win.cc
index 43d1331dd9379336dde52581fde9621635d6f897..eebfdeb7abdac1a07e4070f8ada7128fef411086 100644
--- a/third_party/mojo/src/mojo/edk/embedder/platform_handle_utils_win.cc
+++ b/mojo/edk/embedder/platform_handle_utils_win.cc
@@ -9,7 +9,7 @@
 #include "base/logging.h"
 
 namespace mojo {
-namespace embedder {
+namespace edk {
 
 ScopedPlatformHandle DuplicatePlatformHandle(PlatformHandle platform_handle) {
   DCHECK(platform_handle.is_valid());
@@ -23,5 +23,5 @@ ScopedPlatformHandle DuplicatePlatformHandle(PlatformHandle platform_handle) {
   return ScopedPlatformHandle(PlatformHandle(new_handle));
 }
 
-}  // namespace embedder
+}  // namespace edk
 }  // namespace mojo