allocator cleanup: remove dependencies on allocator from all targets

ui/message_center/message_center.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 221 matching lines @@
             'views/notifier_settings_view_unittest.cc',
           ],
         }],
         ['notifications==0', {  # Android and iOS.
           'sources/': [
             # Exclude everything except main().
             ['exclude', '\\.(cc|mm)$'],
             ['include', '^test/run_all_unittests\\.cc$'],
           ],
         }],
-        # See http://crbug.com/162998#c4 for why this is needed.
-        ['OS=="linux" and use_allocator!="none"', {
-          'dependencies': [
-            '../../base/allocator/allocator.gyp:allocator',
-          ],
-        }],
       ],
     },  # target_name: message_center_unittests
   ],
   'conditions': [
     ['test_isolation_mode != "noop"', {
       'targets': [
         {
           'target_name': 'message_center_unittests_run',
           'type': 'none',
           'dependencies': [
@@ skipping 10 matching lines @@
               'dependencies': [
                 '../../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }