Add cloud_print to the GN build.

cloud_print/cloud_print_resources.gyp

 # Copyright 2013 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.
 {
   'variables': {
     'chromium_code': 1,
 
     'variables': {
       'version_py_path': '<(DEPTH)/build/util/version.py',
       'version_path': 'VERSION',
     },
     'version_py_path': '<(version_py_path) -f',
     'version_path': '<(version_path)',
   },
   'includes': [
     '../build/util/version.gypi',
   ],
   'targets': [
     {
+      # GN: Thes targets for this are split out depending on when the specific
+      # .ver file is used. For example, see:
+      # //cloud_print/sevice/win:exe_version
       'target_name': 'cloud_print_version_resources',
       'type': 'none',
       'variables': {
         'output_dir': 'cloud_print',
         'branding_path': '<(DEPTH)/chrome/app/theme/<(branding_path_component)/BRANDING',
         'template_input_path': '../chrome/app/chrome_version.rc.version',
         'extra_variable_files_arguments': [ '-f', 'BRANDING' ],
         'extra_variable_files': [ 'BRANDING' ], # NOTE: matches that above
       },
       'direct_dependent_settings': {
@@ skipping 50 matching lines @@
             '-f', 'BRANDING',
             '<(DEPTH)/chrome/version.h.in',
             '<@(_outputs)',
           ],
           'message': 'Generating version header file: <@(_outputs)',
         },
       ],
     },
   ],
 }