Add chrome_elf and cloud_print to "gn check"

cloud_print/virtual_driver/win/port_monitor/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.
 
 import("//chrome/version.gni")
 
 assert(is_win)
 
 # When cross-compiling a 64-bit driver for a 32-bit build, some things get name
 # mangled with this suffix.
@@ skipping 33 matching lines @@
     "port_monitor.def",
     "port_monitor_dll.cc",
   ]
 
   deps = [
     ":lib",
     ":resources",
     "//base",
     "//chrome/common:constants",
     "//chrome/common:version_header",
+    "//cloud_print/common",
+    "//cloud_print/virtual_driver/win",
   ]
 
   libs = [ "userenv.lib" ]
 }
 
 source_set("lib") {
   sources = [
     "port_monitor.cc",
     "port_monitor.h",
   ]
 
   deps = [
     "//base",
     "//chrome/common:constants",
     "//chrome/installer/launcher_support",
+    "//cloud_print/common",
     "//cloud_print/virtual_driver/win",
   ]
 }
 
 process_version("resources") {
   template_file = chrome_version_rc_template
   sources = [
     "../gcp_portmon${arch_suffix}_dll.ver",
   ]
 
   # Note: target_gen_dir will be different for each toolchain so the output
   # name doesn't need mangling.
   output = "$target_gen_dir/gcp_portmon_dll.rc"
 }