New build flag system, convert Google Now flag

chrome/chrome.gyp

 # Copyright (c) 2012 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,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 86 matching lines @@
     # on 64-bit Windows only. Targets that end with nacl_win64 should be used
     # by Native Client only.
     # NOTE: Most new includes should go in the OS!="ios" condition below.
     '../build/chrome_settings.gypi',
     '../build/util/version.gypi',
     '../build/win_precompile.gypi',
     'chrome_browser.gypi',
     'chrome_browser_ui.gypi',
     'chrome_common.gypi',
     'chrome_installer_util.gypi',
+    'chrome_features.gypi',
   ],
   'conditions': [
     ['OS!="ios"', {
       'includes': [
         '../apps/apps.gypi',
         'chrome_child.gypi',
         'chrome_debugger.gypi',
         'chrome_dll.gypi',
         'chrome_exe.gypi',
         'chrome_installer.gypi',
@@ skipping 681 matching lines @@
                   '<(DEPTH)/third_party/kasko'
                 ],
               },
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }