Allow SessionService to be disabled.

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 2218 matching lines @@
           'sources/': [
             ['exclude', '^browser/safe_browsing/'],
             ['exclude', '^renderer/safe_browsing/'],
           ],
         }],
         ['enable_automation!=1', {
           'sources/': [
             ['exclude', '^browser/automation/'],
           ],
         }],
+        ['enable_session_service!=1', {
+          'sources!': [
+            'browser/sessions/session_service_unittest.cc',
+          ],
+        }],
         ['chromeos==1', {
           'sources/': [
             ['exclude', '^browser/password_manager/native_backend_gnome_x_unittest.cc'],
             ['exclude', '^browser/password_manager/native_backend_kwallet_x_unittest.cc'],
             ['exclude', '^browser/safe_browsing/download_protection_service_unittest.cc' ],
           ],
         }, { # else: chromeos == 0
           'sources/': [
             ['exclude', '^browser/chromeos/'],
             ['exclude', '^browser/oom_priority_manager_unittest.cc'],
@@ skipping 208 matching lines @@
             # Sync setup uses native ui.
             'browser/ui/webui/sync_setup_handler_unittest.cc',
 
             # about:flags is unsupported.
             'browser/about_flags_unittest.cc',
 
             # There's no Browser/BrowserList on Android.
             'browser/browser_commands_unittest.cc',
             'browser/net/gaia/gaia_oauth_fetcher_unittest.cc',
             'browser/profiles/off_the_record_profile_impl_unittest.cc',
-            'browser/sessions/session_service_unittest.cc',
             'browser/sync/profile_sync_service_session_unittest.cc',
             'browser/sync/sync_global_error_unittest.cc',
             'browser/sync/sync_setup_wizard_unittest.cc',
             'browser/ui/browser_list_unittest.cc',
             'browser/ui/browser_unittest.cc',
             'browser/ui/toolbar/toolbar_model_unittest.cc',
             'browser/ui/toolbar/wrench_menu_model_unittest.cc',
             'browser/ui/webui/html_dialog_tab_contents_delegate_unittest.cc',
             'test/base/browser_with_test_window_test.cc',
             'test/base/browser_with_test_window_test.h',
@@ skipping 2203 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'
 }