Files that are in src/ui/base should be compiled into libui_base.a.

chrome/chrome.gyp

 # Copyright (c) 2011 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': 'tools/build/version.py',
       'version_path': 'VERSION',
@@ skipping 1113 matching lines @@
               ],
             },
           ],
         },
         {
           'target_name': 'infoplist_strings_tool',
           'type': 'executable',
           'dependencies': [
             'chrome_strings',
             '../base/base.gyp:base',
-            '../app/app.gyp:app_base',
+            '../ui/ui.gyp:ui_base',
           ],
           'include_dirs': [
             '<(grit_out_dir)',
           ],
           'sources': [
             'tools/mac_helpers/infoplist_strings_util.mm',
           ],
         },
       ],  # targets
     }, { # else: OS != "mac"
@@ skipping 489 matching lines @@
       }],  # targets
     }],  # os_posix == 1 and OS != "mac"
   ],  # 'conditions'
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: