Stop building FilePathWatcher 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.
 
 {
   'includes': [
     'trace_event/trace_event.gypi',
   ],
   'target_defaults': {
     'variables': {
@@ skipping 883 matching lines @@
               ['include', '^threading/platform_thread_mac\\.'],
               ['include', '^time/time_mac\\.'],
               ['include', '^worker_pool_mac\\.'],
               # Exclude all process/ except the minimal implementation
               # needed on iOS (mostly for unit tests).
               ['exclude', '^process/.*'],
               ['include', '^process/.*_ios\.(cc|mm)$'],
               ['include', '^process/memory_stubs\.cc$'],
               ['include', '^process/process_handle_posix\.cc$'],
               ['include', '^process/process_metrics\\.cc$'],
+              # Exclude unsupported features on iOS.
+              ['exclude', '^files/file_path_watcher.*'],
               ['exclude', '^threading/platform_thread_internal_posix\\.(h|cc)'],
-              ['exclude', 'files/file_path_watcher_fsevents.cc'],
-              ['exclude', 'files/file_path_watcher_fsevents.h'],
-              ['include', 'files/file_path_watcher_mac.cc'],
             ],
             'sources': [
               'process/memory_stubs.cc',
             ],
             'sources!': [
               'message_loop/message_pump_libevent.cc'
             ],
           }],
           ['OS == "ios" and _toolset == "host"', {
             'sources/': [
@@ skipping 126 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }