app_shell: Add version number in user agent

extensions/shell/app_shell.gyp

 # Copyright 2014 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,
   },
   'targets': [
     {
@@ skipping 186 matching lines @@
         '<(DEPTH)/content/content_shell_and_tests.gyp:test_support_content',
         '<(DEPTH)/extensions/extensions.gyp:extensions_shell_and_test_pak',
         '<(DEPTH)/extensions/extensions.gyp:extensions_test_support',
         '<(DEPTH)/testing/gtest.gyp:gtest',
         '<(DEPTH)/ui/aura/aura.gyp:aura_test_support',
       ],
       'sources': [
         '../test/extensions_unittests_main.cc',
         'browser/shell_desktop_controller_unittest.cc',
         'browser/shell_nacl_browser_delegate_unittest.cc',
+        'common/shell_content_client_unittest.cc'
       ],
       'conditions': [
         ['disable_nacl==1', {
           'sources!': [
             'browser/shell_nacl_browser_delegate_unittest.cc',
           ],
         }],
         ['chromeos==1', {
           'dependencies': [
             '<(DEPTH)/chromeos/chromeos.gyp:chromeos_test_support_without_gmock',
@@ skipping 33 matching lines @@
             '<@(_outputs)',
           ],
           'includes': [
             '../../build/util/version.gypi',
           ],
         },
       ],
     },
   ],  # targets
 }