Move net-export resources to //components/net_log

components/net_log.gypi

 # Copyright 2015 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.
 
 {
   'targets': [
     {
       # GN version: //components/net_log
       'target_name': 'net_log',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../net/net.gyp:net',
         'data_reduction_proxy_core_common',
         'version_info',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
         'net_log/chrome_net_log.cc',
         'net_log/chrome_net_log.h',
+        'net_log/net_export_ui_constants.cc',
+        'net_log/net_export_ui_constants.h',
         'net_log/net_log_temp_file.cc',
         'net_log/net_log_temp_file.h',
       ],
     },
   ],
 }