Add cloud_print to the GN build.

cloud_print/common/BUILD.gn

Index: cloud_print/common/BUILD.gn
diff --git a/device/devices_app/public/cpp/BUILD.gn b/cloud_print/common/BUILD.gn
similarity index 54%
copy from device/devices_app/public/cpp/BUILD.gn
copy to cloud_print/common/BUILD.gn
index 301d20f8eb5e8a10a4725730bf234270fb2d69a2..ca0b546d10481b4239afbd3eb292adb74f8490f4 100644
--- a/device/devices_app/public/cpp/BUILD.gn
+++ b/cloud_print/common/BUILD.gn
@@ -2,28 +2,25 @@
 # 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",
   ]
 }