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

components/nacl/BUILD.gn

Index: components/nacl/BUILD.gn
diff --git a/components/nacl/BUILD.gn b/components/nacl/BUILD.gn
index dbc32ee935029acfdfc8bf99ea13e57848f9781c..f8ed27385a6d68e46a451faf19a299525e8cdb1a 100644
--- a/components/nacl/BUILD.gn
+++ b/components/nacl/BUILD.gn
@@ -38,9 +38,14 @@ if (enable_nacl) {
       "//ppapi/c",
       "//ppapi/proxy:ipc",
       "//ppapi/shared_impl",
-      "//third_party/mojo/src/mojo/edk/embedder",
     ]
 
+    if (use_chrome_edk) {
+      deps += [ "//mojo/edk/embedder" ]
+    } else {
+      deps += [ "//third_party/mojo/src/mojo/edk/embedder" ]
+    }
+
     if (enable_nacl_untrusted) {
       data_deps = [ "//ppapi/native_client:irt" ]
     }