[protector] Added SessionStartupChange for representing changes in SessionStartupPref.

chrome/chrome_tests.gypi

 # Copyright (c) 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' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1641 matching lines @@
         'browser/process_singleton_mac_unittest.cc',
         'browser/profiles/avatar_menu_model_unittest.cc',
         'browser/profiles/gaia_info_update_service_unittest.cc',
         'browser/profiles/off_the_record_profile_impl_unittest.cc',
         'browser/profiles/profile_dependency_manager_unittest.cc',
         'browser/profiles/profile_downloader_unittest.cc',
         'browser/profiles/profile_info_cache_unittest.cc',
         'browser/profiles/profile_info_cache_unittest.h',
         'browser/profiles/profile_info_util_unittest.cc',
         'browser/profiles/profile_manager_unittest.cc',
+        'browser/protector/session_startup_change_unittest.cc',
         'browser/renderer_host/web_cache_manager_unittest.cc',
         'browser/renderer_host/plugin_info_message_filter_unittest.cc',
         'browser/resources/print_preview/print_preview_utils.js',
         'browser/resources/print_preview/print_preview_utils_unittest.gtestjs',
         'browser/resources_util_unittest.cc',
         'browser/rlz/rlz_unittest.cc',
         'browser/safe_browsing/bloom_filter_unittest.cc',
         'browser/safe_browsing/browser_feature_extractor_unittest.cc',
         'browser/safe_browsing/chunk_range_unittest.cc',
         'browser/safe_browsing/client_side_detection_host_unittest.cc',
@@ skipping 3049 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }