Start axing NTP4 dead 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 1771 matching lines @@
       'browser/ui/webui/ntp/new_tab_page_sync_handler.h',
       'browser/ui/webui/ntp/new_tab_ui.cc',
       'browser/ui/webui/ntp/new_tab_ui.h',
       'browser/ui/webui/ntp/ntp_login_handler.cc',
       'browser/ui/webui/ntp/ntp_login_handler.h',
       'browser/ui/webui/ntp/ntp_resource_cache.cc',
       'browser/ui/webui/ntp/ntp_resource_cache.h',
       'browser/ui/webui/ntp/ntp_resource_cache_factory.cc',
       'browser/ui/webui/ntp/ntp_resource_cache_factory.h',
       'browser/ui/webui/ntp/ntp_stats.h',
-      'browser/ui/webui/ntp/recently_closed_tabs_handler.cc',
-      'browser/ui/webui/ntp/recently_closed_tabs_handler.h',
       'browser/ui/webui/ntp/suggestions_combiner.cc',
       'browser/ui/webui/ntp/suggestions_combiner.h',
       'browser/ui/webui/ntp/suggestions_page_handler.cc',
       'browser/ui/webui/ntp/suggestions_page_handler.h',
       'browser/ui/webui/ntp/suggestions_source.h',
       'browser/ui/webui/ntp/suggestions_source_top_sites.cc',
       'browser/ui/webui/ntp/suggestions_source_top_sites.h',
       'browser/ui/webui/ntp/thumbnail_source.cc',
       'browser/ui/webui/ntp/thumbnail_source.h',
       'browser/ui/webui/options/advanced_options_utils.h',
@@ skipping 1389 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }