Wrapped data reduction proxy initialization into its own class

chrome/chrome_browser.gypi

 # Copyright 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.
 
 {
   'variables': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 1741 matching lines @@
       'browser/net/quota_policy_channel_id_store.cc',
       'browser/net/quota_policy_channel_id_store.h',
       'browser/net/referrer.cc',
       'browser/net/referrer.h',
       'browser/net/resource_prefetch_predictor_observer.cc',
       'browser/net/resource_prefetch_predictor_observer.h',
       'browser/net/safe_search_util.cc',
       'browser/net/safe_search_util.h',
       'browser/net/service_providers_win.cc',
       'browser/net/service_providers_win.h',
+      'browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.cc',
+      'browser/net/spdyproxy/data_reduction_proxy_chrome_io_data.h',
       'browser/net/spdyproxy/data_reduction_proxy_chrome_settings.cc',
       'browser/net/spdyproxy/data_reduction_proxy_chrome_settings.h',
       'browser/net/spdyproxy/data_reduction_proxy_chrome_settings_factory.cc',
       'browser/net/spdyproxy/data_reduction_proxy_chrome_settings_factory.h',
       'browser/net/spdyproxy/data_reduction_proxy_infobar_delegate.cc',
       'browser/net/spdyproxy/data_reduction_proxy_infobar_delegate.h',
       'browser/net/spdyproxy/data_reduction_proxy_settings_android.cc',
       'browser/net/spdyproxy/data_reduction_proxy_settings_android.h',
       'browser/net/ssl_config_service_manager.h',
       'browser/net/ssl_config_service_manager_pref.cc',
@@ skipping 1924 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }