base: Remove DiscardableMemoryMach.

base/base.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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
       'base_i18n_target': 0,
     },
@@ skipping 951 matching lines @@
           ['OS == "linux" and >(nacl_untrusted_build)==0', {
             'sources!': [
               'files/file_path_watcher_fsevents.cc',
               'files/file_path_watcher_fsevents.h',
               'files/file_path_watcher_kqueue.cc',
               'files/file_path_watcher_kqueue.h',
               'files/file_path_watcher_stub.cc',
             ],
           }],
           ['(OS == "mac" or OS == "ios") and >(nacl_untrusted_build)==0', {
-            'sources': [
-              'memory/discardable_memory_mach.cc',
-              'memory/discardable_memory_mach.h',
-            ],
             'sources/': [
               ['exclude', '^files/file_path_watcher_stub\\.cc$'],
               ['exclude', '^base_paths_posix\\.cc$'],
               ['exclude', '^native_library_posix\\.cc$'],
               ['exclude', '^strings/sys_string_conversions_posix\\.cc$'],
             ],
           }],
           ['<(os_bsd)==1 and >(nacl_untrusted_build)==0', {
             'sources': [
               'process/memory_stubs.cc',
@@ skipping 56 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }