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

mojo/edk/js/BUILD.gn

Index: mojo/edk/js/BUILD.gn
diff --git a/third_party/mojo/src/mojo/edk/js/BUILD.gn b/mojo/edk/js/BUILD.gn
similarity index 84%
copy from third_party/mojo/src/mojo/edk/js/BUILD.gn
copy to mojo/edk/js/BUILD.gn
index ed1b81f7fce951d1558991307958be578824987e..d68920c04df3117c3822a73c3e278f8040f6431c 100644
--- a/third_party/mojo/src/mojo/edk/js/BUILD.gn
+++ b/mojo/edk/js/BUILD.gn
@@ -43,9 +43,9 @@ mojo_edk_source_set("js") {
     "//v8",
   ]
 
-  mojo_sdk_deps = [
-    "mojo/public/cpp/environment",
-    "mojo/public/cpp/system",
+  deps = [
+    "//third_party/mojo/src/mojo/public/cpp/environment",
+    "//third_party/mojo/src/mojo/public/cpp/system",
   ]
 }
 
@@ -56,13 +56,9 @@ mojo_edk_source_set("js_unittests") {
   ]
 
   deps = [
+    "//mojo/edk/js",
+    "//mojo/edk/test:test_support",
     "//testing/gtest",
+    "//third_party/mojo/src/mojo/public/cpp/system",
   ]
-
-  mojo_edk_deps = [
-    "mojo/edk/js",
-    "mojo/edk/test:test_support",
-  ]
-
-  mojo_sdk_deps = [ "mojo/public/cpp/system" ]
 }