[SafeBrowsing] Block dangerous unchecked downloads based on a Finch trial.

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 2541 matching lines @@
       'browser/safe_browsing/safe_browsing_store.cc',
       'browser/safe_browsing/safe_browsing_store.h',
       'browser/safe_browsing/safe_browsing_store_file.cc',
       'browser/safe_browsing/safe_browsing_store_file.h',
       'browser/safe_browsing/sandboxed_dmg_analyzer_mac.cc',
       'browser/safe_browsing/sandboxed_dmg_analyzer_mac.h',
       'browser/safe_browsing/sandboxed_zip_analyzer.cc',
       'browser/safe_browsing/sandboxed_zip_analyzer.h',
       'browser/safe_browsing/two_phase_uploader.cc',
       'browser/safe_browsing/two_phase_uploader.h',
+      'browser/safe_browsing/unverified_download_field_trial.cc',
+      'browser/safe_browsing/unverified_download_field_trial.h',
+      'browser/safe_browsing/unverified_download_policy.cc',
+      'browser/safe_browsing/unverified_download_policy.h',
     ],
     'chrome_browser_search_engines_sources': [
       'browser/search_engines/chrome_template_url_service_client.cc',
       'browser/search_engines/chrome_template_url_service_client.h',
       'browser/search_engines/search_provider_install_data.cc',
       'browser/search_engines/search_provider_install_data.h',
       'browser/search_engines/search_provider_install_state_message_filter.cc',
       'browser/search_engines/search_provider_install_state_message_filter.h',
       'browser/search_engines/template_url_fetcher_factory.cc',
       'browser/search_engines/template_url_fetcher_factory.h',
@@ skipping 1541 matching lines @@
             '../components/components.gyp:omnibox_browser',
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
           ],
         },
       ],
     }],
   ],
 }