Removing deprecated ios/web/user_metrics.cc and references to it.

ios/web/ios_web.gyp

 # Copyright 2014 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.
 
 {
   'variables': {
     'chromium_code': 1,
    },
   'targets': [
     {
@@ skipping 139 matching lines @@
         'public/referrer_util.cc',
         'public/referrer_util.h',
         'public/security_style.h',
         'public/ssl_status.cc',
         'public/ssl_status.h',
         'public/string_util.h',
         'public/url_scheme_util.h',
         'public/url_schemes.h',
         'public/url_schemes.mm',
         'public/url_util.h',
-        'public/user_metrics.h',
         'public/web/url_data_source_ios.h',
         'public/web_capabilities.cc',
         'public/web_capabilities.h',
         'public/web_client.h',
         'public/web_client.mm',
         'public/web_kit_constants.h',
         'public/web_state/context_menu_params.h',
         'public/web_state/credential.h',
         'public/web_state/crw_web_controller_observer.h',
         'public/web_state/crw_web_user_interface_delegate.h',
@@ skipping 20 matching lines @@
         'public/web_state/web_state_observer_bridge.h',
         'public/web_state/web_state_policy_decider.h',
         'public/web_state/web_state_user_data.h',
         'public/web_thread.h',
         'public/web_thread_delegate.h',
         'public/web_ui_ios_data_source.h',
         'public/web_view_creation_util.h',
         'string_util.cc',
         'url_scheme_util.mm',
         'url_util.cc',
-        'user_metrics.cc',
         'web_kit_constants.cc',
         'web_state/blocked_popup_info.h',
         'web_state/blocked_popup_info.mm',
         'web_state/context_menu_params.mm',
         'web_state/credential.cc',
         'web_state/crw_pass_kit_downloader.h',
         'web_state/crw_pass_kit_downloader.mm',
         'web_state/crw_web_view_proxy_impl.h',
         'web_state/crw_web_view_proxy_impl.mm',
         'web_state/crw_web_view_scroll_view_proxy.mm',
@@ skipping 344 matching lines @@
       'dependencies': [
         '../../base/base.gyp:base'
       ],
       'sources': [
         'public/user_agent.h',
         'public/user_agent.mm',
       ],
     },
   ],
 }