Fix missing symbols for pre-linking of the Cast sender library for 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 373 matching lines @@
           'metrics/sample_vector.h',
           'metrics/sparse_histogram.cc',
           'metrics/sparse_histogram.h',
           'metrics/statistics_recorder.cc',
           'metrics/statistics_recorder.h',
           'metrics/user_metrics.cc',
           'metrics/user_metrics.h',
           'metrics/user_metrics_action.h',
           'move.h',
           'native_library.h',
+          'native_library_ios.mm',
           'native_library_mac.mm',
           'native_library_posix.cc',
           'native_library_win.cc',
           'nix/mime_util_xdg.cc',
           'nix/mime_util_xdg.h',
           'nix/xdg_util.cc',
           'nix/xdg_util.h',
           'numerics/safe_conversions.h',
           'numerics/safe_conversions_impl.h',
           'numerics/safe_math.h',
@@ skipping 458 matching lines @@
               ['include', '^strings/sys_string_conversions_mac\\.'],
               ['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', '^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'
@@ skipping 124 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }