Hotlist Slow: Adopt ChromeOS Session restore tab loading timeouts.

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 2496 matching lines @@
       'browser/sessions/session_restore.cc',
       'browser/sessions/session_restore.h',
       'browser/sessions/session_service.cc',
       'browser/sessions/session_service.h',
       'browser/sessions/session_service_factory.cc',
       'browser/sessions/session_service_factory.h',
       'browser/sessions/session_service_utils.cc',
       'browser/sessions/session_service_utils.h',
       'browser/sessions/tab_loader_delegate.cc',
       'browser/sessions/tab_loader_delegate.h',
-      'browser/sessions/tab_loader_delegate_chromeos.cc',
     ],
     'chrome_browser_signin_sources': [
       'browser/signin/about_signin_internals_factory.cc',
       'browser/signin/about_signin_internals_factory.h',
       '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',
@@ skipping 1192 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' ]
         },
       ],
     },],
   ],
 }