mac: Flush the autorelease pool after making a browser window in browser tests.

chrome/chrome_tests_unit.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': {
     'chrome_unit_tests_sources': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 1454 matching lines @@
       'browser/media/router/issue_manager_unittest.cc',
       'browser/media/router/issue_unittest.cc',
       'browser/media/router/media_route_unittest.cc',
       'browser/media/router/media_router_mojo_impl_unittest.cc',
       'browser/media/router/media_router_type_converters_unittest.cc',
       'browser/media/router/media_sink_unittest.cc',
       'browser/media/router/media_source_helper_unittest.cc',
       'browser/media/router/media_source_unittest.cc',
       'browser/media/router/presentation_media_sinks_observer_unittest.cc',
       'browser/media/router/presentation_service_delegate_impl_unittest.cc',
-      'browser/media/router/presentation_session_state_observer_unittest.cc',      
+      'browser/media/router/presentation_session_state_observer_unittest.cc',
       'browser/ui/webui/media_router/media_cast_mode_unittest.cc',
       'browser/ui/webui/media_router/media_router_dialog_controller_unittest.cc',
       'browser/ui/webui/media_router/media_router_test.cc',
       'browser/ui/webui/media_router/media_router_test.h',
       'browser/ui/webui/media_router/media_router_webui_message_handler_unittest.cc',
       'browser/ui/webui/media_router/query_result_manager_unittest.cc',
     ],
     # Everything but Android and iOS (iOS is handled separately).
     'chrome_unit_tests_non_android_sources': [
       # Bookmark export/import are handled via the BookmarkColumns
@@ skipping 330 matching lines @@
         'test/base/chrome_unit_test_suite.cc',
         'test/base/chrome_unit_test_suite.h',
         'test/base/dialog_test_browser_window.cc',
         'test/base/dialog_test_browser_window.h',
         'test/base/find_in_page_observer.cc',
         'test/base/find_in_page_observer.h',
         'test/base/history_index_restore_observer.cc',
         'test/base/history_index_restore_observer.h',
         'test/base/in_process_browser_test.cc',
         'test/base/in_process_browser_test.h',
+        'test/base/in_process_browser_test_mac.cc',
         'test/base/profile_mock.cc',
         'test/base/profile_mock.h',
         'test/base/scoped_browser_locale.cc',
         'test/base/scoped_browser_locale.h',
         'test/base/scoped_bundle_swizzler_mac.h',
         'test/base/scoped_bundle_swizzler_mac.mm',
         'test/base/scoped_testing_local_state.cc',
         'test/base/scoped_testing_local_state.h',
         'test/base/test_browser_window.cc',
         'test/base/test_browser_window.h',
@@ skipping 1052 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }