Make gn check //examples/* pass

examples/apptest/BUILD.gn

Index: examples/apptest/BUILD.gn
diff --git a/examples/apptest/BUILD.gn b/examples/apptest/BUILD.gn
index bb8b5b9002746c9f0ced61ada284600df552332c..6582af749c9c60049a603aa9c47f266ea152fd10 100644
--- a/examples/apptest/BUILD.gn
+++ b/examples/apptest/BUILD.gn
@@ -28,7 +28,9 @@ mojo_native_application("service") {
     ":bindings",
     "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/application:standalone",
-    "//mojo/public/cpp/utility"
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/system",
+    "//mojo/public/cpp/utility",
   ]
 }
 
@@ -50,6 +52,9 @@ mojo_native_application("apptests") {
     "//mojo/public/c/system:for_shared_library",
     "//mojo/public/cpp/application:standalone",
     "//mojo/public/cpp/application:test_support_standalone",
+    "//mojo/public/cpp/bindings:callback",
+    "//mojo/public/cpp/environment",
+    "//mojo/public/cpp/system",
    ]
 
    datadeps = [ ":service", ]