Add cloud_print to the GN build.

cloud_print/common/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-source_set("cpp") {
+source_set("common") {
   sources = [
-    "constants.cc",
-    "constants.h",
+    "win/cloud_print_utils.cc",
+    "win/cloud_print_utils.h",
   ]
 
-  public_deps = [
+  deps = [
     "//base",
   ]
 }
 
-source_set("factory") {
+source_set("install_utils") {
   sources = [
-    "devices_app_factory.cc",
-    "devices_app_factory.h",
+    "win/install_utils.cc",
+    "win/install_utils.h",
   ]
 
   deps = [
-    "//device/devices_app:lib",
-  ]
-
-  public_deps = [
+    ":common",
     "//base",
   ]
 }