Add APIs to protect critical tasks on iOS.

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,
     },
     'target_conditions': [
@@ skipping 68 matching lines @@
           'callback_internal.cc',
           'callback_internal.h',
           'cancelable_callback.h',
           'chromeos/chromeos_version.cc',
           'chromeos/chromeos_version.h',
           'command_line.cc',
           'command_line.h',
           'compiler_specific.h',
           'cpu.cc',
           'cpu.h',
+          'critical_closure.h',
+          'critical_closure_ios.mm',
+          'critical_closure_stub.cc',
           'debug/alias.cc',
           'debug/alias.h',
           'debug/debug_on_start_win.cc',
           'debug/debug_on_start_win.h',
           'debug/debugger.cc',
           'debug/debugger.h',
           'debug/debugger_posix.cc',
           'debug/debugger_win.cc',
           'debug/leak_annotations.h',
           'debug/leak_tracker.h',
@@ skipping 45 matching lines @@
           'gtest_prod_util.h',
           'guid.cc',
           'guid.h',
           'guid_posix.cc',
           'guid_win.cc',
           'hash_tables.h',
           'hi_res_timer_manager_posix.cc',
           'hi_res_timer_manager_win.cc',
           'hi_res_timer_manager.h',
           'id_map.h',
+          'ios/scoped_critical_action.h',
+          'ios/scoped_critical_action.mm',
           'json/json_file_value_serializer.cc',
           'json/json_file_value_serializer.h',
           'json/json_parser.cc',
           'json/json_parser.h',
           'json/json_reader.cc',
           'json/json_reader.h',
           'json/json_string_value_serializer.cc',
           'json/json_string_value_serializer.h',
           'json/json_value_converter.h',
           'json/json_writer.cc',
@@ skipping 426 matching lines @@
               ['include', '^mac/scoped_nsautorelease_pool\\.'],
               ['include', '^message_pump_mac\\.'],
               ['include', '^threading/platform_thread_mac\\.'],
               ['include', '^sys_string_conversions_mac\\.'],
               ['include', '^time_mac\\.'],
               ['include', '^worker_pool_mac\\.'],
               # Exclude all process_util except the minimal implementation
               # needed on iOS (mostly for unit tests).
               ['exclude', '^process_util'],
               ['include', '^process_util_ios\\.mm$'],
+              # Exclude the stub implementation for critical closure on iOS.
+              # 'critical_closure_ios.mm' will be used for iOS.
+              ['exclude', '^critical_closure_stub\\.cc$'],
             ],
           }],
           ['OS != "mac" or >(nacl_untrusted_build)==1', {
               'sources!': [
                 'mac/scoped_aedesc.h'
               ],
           }],
           # For now, just test the *BSD platforms enough to exclude them.
           # Subsequent changes will include them further.
           ['OS != "freebsd" or >(nacl_untrusted_build)==1', {
@@ skipping 60 matching lines @@
           # Remove all unnecessary files for build_nexe.py to avoid exceeding
           # command-line-string limitation when building NaCl on Windows.
           ['OS == "win" and >(nacl_untrusted_build)==1', {
               'sources/': [ ['exclude', '\\.h$'] ],
           }],
         ],
       }],
     ],
   },
 }