Change mojo application name to {name}.mojo

services/js/BUILD.gn

Index: services/js/BUILD.gn
diff --git a/services/js/BUILD.gn b/services/js/BUILD.gn
index ce2eac6da11c9e188c8661bc9a5ea79f2f60d7c6..6f2dd1993c39dee6e8e4698f79d0a489036397e9 100644
--- a/services/js/BUILD.gn
+++ b/services/js/BUILD.gn
@@ -2,13 +2,15 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//mojo/public/mojo_application.gni")
+
 group("js") {
   deps = [
     ":js_content_handler",
   ]
 }
 
-shared_library("js_content_handler") {
+mojo_native_application("js_content_handler") {
   sources = [
     "content_handler_main.cc",
     "js_app.cc",