Cleanup: Remove unused ntp_background_util.* component.

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': {
     'chrome_browser_ui_non_ios_sources': [
       'browser/ui/accelerator_utils.h',
       'browser/ui/android/android_about_app_info.cc',
       'browser/ui/android/android_about_app_info.h',
@@ skipping 1443 matching lines @@
       'browser/ui/fullscreen/fullscreen_controller.cc',
       'browser/ui/fullscreen/fullscreen_controller.h',
       'browser/ui/fullscreen/fullscreen_exit_bubble_type.cc',
       'browser/ui/fullscreen/fullscreen_exit_bubble_type.h',
       'browser/ui/location_bar/location_bar.cc',
       'browser/ui/location_bar/location_bar.h',
       'browser/ui/location_bar/location_bar_util.cc',
       'browser/ui/location_bar/location_bar_util.h',
       'browser/ui/location_bar/origin_chip_info.cc',
       'browser/ui/location_bar/origin_chip_info.h',
-      'browser/ui/ntp_background_util.cc',
-      'browser/ui/ntp_background_util.h',
       'browser/ui/omnibox/alternate_nav_infobar_delegate.cc',
       'browser/ui/omnibox/alternate_nav_infobar_delegate.h',
       'browser/ui/omnibox/omnibox_controller.cc',
       'browser/ui/omnibox/omnibox_controller.h',
       'browser/ui/omnibox/omnibox_current_page_delegate.h',
       'browser/ui/omnibox/omnibox_current_page_delegate_impl.cc',
       'browser/ui/omnibox/omnibox_current_page_delegate_impl.h',
       'browser/ui/omnibox/omnibox_edit_controller.cc',
       'browser/ui/omnibox/omnibox_edit_controller.h',
       'browser/ui/omnibox/omnibox_edit_model.cc',
@@ skipping 1463 matching lines @@
         }],
         ['enable_spellcheck==1', {
           'dependencies': [
             '../third_party/hunspell/hunspell.gyp:hunspell',
           ],
         }],
       ],
     },
   ],
 }