Add missing dependencies.

ui/app_list/app_list.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,
   },
   'targets': [
     {
@@ skipping 368 matching lines @@
         },
       ],
     }],  # toolkit_views==1
     ['test_isolation_mode != "noop"', {
       'targets': [
         {
           'target_name': 'app_list_unittests_run',
           'type': 'none',
           'dependencies': [
             'app_list_unittests',
+            '../../third_party/mesa/mesa.gyp:osmesa',
           ],
           'includes': [
             '../../build/isolate.gypi',
           ],
           'sources': [
             'app_list_unittests.isolate',
           ],
           'conditions': [
             ['use_x11 == 1', {
               'dependencies': [
                 '../../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }