Minimal Chrome Frame with Aura.

chrome/chrome_installer.gypi

 # 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': {
     'lastchange_path': '../build/util/LASTCHANGE',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
   },
   'conditions': [
@@ skipping 356 matching lines @@
               'variables': {
                  'branding_dir': 'app/theme/google_chrome',
                  'branding_dir_100': 'app/theme/default_100_percent/google_chrome',
               },
             }, { # else branding!="Chrome"
               'variables': {
                  'branding_dir': 'app/theme/chromium',
                  'branding_dir_100': 'app/theme/default_100_percent/chromium',
               },
             }],
-            ['use_aura==1 or target_arch=="x64"', {
+            ['target_arch=="x64"', {
               'dependencies!': [
                 '../chrome_frame/chrome_frame.gyp:chrome_tab_idl',
                 '../chrome_frame/chrome_frame.gyp:npchrome_frame',
               ],
               'defines': [
                 'OMIT_CHROME_FRAME',
               ],
             }],
           ],
         },
@@ skipping 811 matching lines @@
          'branding_dir_100': 'app/theme/default_100_percent/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': 'app/theme/chromium',
          'branding_dir_100': 'app/theme/default_100_percent/chromium',
       },
     }],
   ],
 }