GN rules for everything in //mojo

mojo/apps/js/BUILD.gn

Index: mojo/apps/js/BUILD.gn
diff --git a/mojo/apps/js/BUILD.gn b/mojo/apps/js/BUILD.gn
index 16332d93ee493a54241d355bae68bdc2f2659b79..89349e696224b141a16f3e9b492824a855fc16f1 100644
--- a/mojo/apps/js/BUILD.gn
+++ b/mojo/apps/js/BUILD.gn
@@ -2,6 +2,26 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//mojo/system.gni")
+
+shared_library("mojo_js") {
+  sources = [
+    "application_delegate_impl.cc",
+    "js_app.cc",
+    "mojo_module.cc",
+    "main.cc"
+  ]
+
+  deps = [
+    ":js",
+    "//base:i18n",
+    "//mojo/application",
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/utility",
+    "//mojo/services/public/interfaces/content_handler",
+  ] + mojo_system_for_shared_library
+}
+
 # GYP version: part of mojo/mojo_apps.gypi:mojo_js_lib
 source_set("js") {
   deps = [
@@ -10,6 +30,7 @@ source_set("js") {
     "//mojo/apps/js/bindings",
     "//mojo/apps/js/bindings/gl",
     "//mojo/bindings/js",
+    "//v8",
   ]
   sources = [
     "mojo_runner_delegate.cc",