Implement A/B experiment for anti-DDoS.

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 2127 matching lines @@
         'browser/translate/translate_infobar_delegate.h',
         'browser/translate/translate_infobar_view.h',
         'browser/translate/translate_manager.cc',
         'browser/translate/translate_manager.h',
         'browser/translate/translate_prefs.cc',
         'browser/translate/translate_prefs.h',
         'browser/translate/translate_tab_helper.cc',
         'browser/translate/translate_tab_helper.h',
         'browser/transport_security_persister.cc',
         'browser/transport_security_persister.h',
+        'browser/trials/http_throttling_trial.cc',
+        'browser/trials/http_throttling_trial.h',
         'browser/ui/app_modal_dialogs/app_modal_dialog.cc',
         'browser/ui/app_modal_dialogs/app_modal_dialog.h',
         'browser/ui/app_modal_dialogs/app_modal_dialog_queue.cc',
         'browser/ui/app_modal_dialogs/app_modal_dialog_queue.h',
         'browser/ui/app_modal_dialogs/js_modal_dialog.cc',
         'browser/ui/app_modal_dialogs/js_modal_dialog.h',
         'browser/ui/app_modal_dialogs/message_box_handler.cc',
         'browser/ui/app_modal_dialogs/message_box_handler.h',
         'browser/ui/app_modal_dialogs/native_app_modal_dialog.h',
         'browser/ui/blocked_content/blocked_content_container.cc',
@@ skipping 2493 matching lines @@
       'hard_dependency': 1,
     },
   ],
 }
 
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