Make gn check //{,mojo}/services/* pass

mojo/services/public/cpp/network/BUILD.gn

Index: mojo/services/public/cpp/network/BUILD.gn
diff --git a/mojo/services/public/cpp/network/BUILD.gn b/mojo/services/public/cpp/network/BUILD.gn
index 045c0b7e3e59eecfde5a19f9c7cfffa4dbb94cdd..f8db162d1103e850bf3ee55522c52a0c31c0bda6 100644
--- a/mojo/services/public/cpp/network/BUILD.gn
+++ b/mojo/services/public/cpp/network/BUILD.gn
@@ -3,15 +3,6 @@
 # found in the LICENSE file.
 
 source_set("network") {
-  deps = [
-    "//base",
-    "//mojo/application",
-    "//mojo/common",
-    "//mojo/environment:chromium",
-    "//mojo/public/c/system:for_component",
-    "//mojo/services/public/interfaces/network",
-  ]
-
   sources = [
     "udp_socket_wrapper.cc",
     "udp_socket_wrapper.h",
@@ -20,4 +11,14 @@ source_set("network") {
     "web_socket_write_queue.cc",
     "web_socket_write_queue.h",
   ]
+
+  deps = [
+    "//base",
+    "//mojo/application",
+    "//mojo/common",
+    "//mojo/environment:chromium",
+    "//mojo/public/c/system:for_component",
+    "//mojo/public/cpp/system",
+    "//mojo/services/public/interfaces/network",
+  ]
 }