Store Origin Trials public key in browser prefs

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 2403 matching lines @@
       'browser/prefs/browser_prefs.cc',
       'browser/prefs/browser_prefs.h',
       'browser/prefs/chrome_pref_model_associator_client.cc',
       'browser/prefs/chrome_pref_model_associator_client.h',
       'browser/prefs/chrome_pref_service_factory.cc',
       'browser/prefs/chrome_pref_service_factory.h',
       'browser/prefs/command_line_pref_store.cc',
       'browser/prefs/command_line_pref_store.h',
       'browser/prefs/incognito_mode_prefs.cc',
       'browser/prefs/incognito_mode_prefs.h',
+      'browser/prefs/origin_trial_prefs.cc',
+      'browser/prefs/origin_trial_prefs.h',
       'browser/prefs/pref_metrics_service.cc',
       'browser/prefs/pref_metrics_service.h',
       'browser/prefs/pref_service_syncable_util.cc',
       'browser/prefs/pref_service_syncable_util.h',
       'browser/prefs/profile_pref_store_manager.cc',
       'browser/prefs/profile_pref_store_manager.h',
       'browser/prefs/session_startup_pref.cc',
       'browser/prefs/session_startup_pref.h',
     ],
     # Used both when (enable_basic_printing==1 or enable_print_preview==1).
@@ skipping 1838 matching lines @@
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
             'common',
           ],
         },
       ],
     }],
   ],
 }