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

mojo/services/network/public/cpp/BUILD.gn

Index: mojo/services/network/public/cpp/BUILD.gn
diff --git a/mojo/services/network/public/cpp/BUILD.gn b/mojo/services/network/public/cpp/BUILD.gn
index 030636c3b88ff82de9916a3453f9dfcc481d498b..7a079895d0145ea8c2c9e8e15c4f3ab7d7cc7fb4 100644
--- a/mojo/services/network/public/cpp/BUILD.gn
+++ b/mojo/services/network/public/cpp/BUILD.gn
@@ -22,10 +22,7 @@ mojo_sdk_source_set("cpp") {
     "//mojo/application/public/cpp",
     "//mojo/environment:chromium",
     "//mojo/message_pump",
-  ]
-
-  mojo_sdk_deps = [
-    "mojo/public/c/system",
-    "mojo/public/cpp/system",
+    "//third_party/mojo/src/mojo/public/c/system",
+    "//third_party/mojo/src/mojo/public/cpp/system",
   ]
 }