Remove chrome.principals API

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 2523 matching lines @@
       'browser/signin/account_reconcilor_factory.cc',
       'browser/signin/account_reconcilor_factory.h',
       'browser/signin/account_tracker_service_factory.cc',
       'browser/signin/account_tracker_service_factory.h',
       'browser/signin/chrome_signin_client.cc',
       'browser/signin/chrome_signin_client.h',
       'browser/signin/chrome_signin_client_factory.cc',
       'browser/signin/chrome_signin_client_factory.h',
       'browser/signin/local_auth.cc',
       'browser/signin/local_auth.h',
-      'browser/signin/principals_message_filter.cc',
-      'browser/signin/principals_message_filter.h',
       'browser/signin/profile_identity_provider.cc',
       'browser/signin/profile_identity_provider.h',
       'browser/signin/profile_oauth2_token_service_factory.cc',
       'browser/signin/profile_oauth2_token_service_factory.h',
       'browser/signin/screenlock_bridge.cc',
       'browser/signin/screenlock_bridge.h',
       'browser/signin/signin_cookie_changed_subscription.cc',
       'browser/signin/signin_cookie_changed_subscription.h',
       'browser/signin/signin_error_controller_factory.cc',
       'browser/signin/signin_error_controller_factory.h',
@@ skipping 1206 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }