Remove unused DataReductionProxyInfoBar and related code

chrome/chrome_browser_ui.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': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 419 matching lines @@
       'browser/ui/android/content_settings/popup_blocked_infobar_delegate.cc',
       'browser/ui/android/content_settings/popup_blocked_infobar_delegate.h',
       'browser/ui/android/context_menu_helper.cc',
       'browser/ui/android/context_menu_helper.h',
       'browser/ui/android/infobars/app_banner_infobar_android.cc',
       'browser/ui/android/infobars/app_banner_infobar_android.h',
       'browser/ui/android/infobars/autofill_save_card_infobar.cc',
       'browser/ui/android/infobars/autofill_save_card_infobar.h',
       'browser/ui/android/infobars/confirm_infobar.cc',
       'browser/ui/android/infobars/confirm_infobar.h',
-      'browser/ui/android/infobars/data_reduction_proxy_infobar.cc',
-      'browser/ui/android/infobars/data_reduction_proxy_infobar.h',
       'browser/ui/android/infobars/download_overwrite_infobar.cc',
       'browser/ui/android/infobars/download_overwrite_infobar.h',
       'browser/ui/android/infobars/generated_password_saved_infobar.cc',
       'browser/ui/android/infobars/generated_password_saved_infobar.h',
       'browser/ui/android/infobars/infobar_android.cc',
       'browser/ui/android/infobars/infobar_android.h',
       'browser/ui/android/infobars/infobar_container_android.cc',
       'browser/ui/android/infobars/infobar_container_android.h',
       'browser/ui/android/infobars/save_password_infobar.cc',
       'browser/ui/android/infobars/save_password_infobar.h',
@@ skipping 2870 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }