Move the iOS user agent functions to ios/web/public.

content/content_common.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../gpu/command_buffer/command_buffer.gyp:gles2_utils',
     '../net/net.gyp:net',
@@ skipping 454 matching lines @@
       'common/socket_stream_messages.h',
       'common/speech_recognition_messages.h',
       'common/ssl_status_serialization.cc',
       'common/ssl_status_serialization.h',
       'common/swapped_out_messages.cc',
       'common/swapped_out_messages.h',
       'common/text_input_client_messages.h',
       'common/url_schemes.cc',
       'common/url_schemes.h',
       'common/user_agent.cc',
-      'common/user_agent_ios.mm',
       'common/utility_messages.h',
       'common/view_message_enums.h',
       'common/view_messages.h',
       'common/webplugin_geometry.cc',
       'common/webplugin_geometry.h',
       'common/websocket.cc',
       'common/websocket.h',
       'common/websocket_messages.h',
       'common/worker_messages.h',
       'common/zygote_commands_linux.h',
@@ skipping 378 matching lines @@
     }, {
       'defines': ['USE_SECCOMP_BPF'],
     }],
     ['use_ozone==1', {
       'dependencies': [
         '../ui/ozone/ozone.gyp:ozone',
       ],
     }],
   ],
 }