Add a unit test for ProcessWatcher::EnsureProcessTerminated().

chrome/chrome.gyp

 # Copyright (c) 2009 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': {
     'chromium_code': 1,
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 3806 matching lines @@
         'common/ipc_message_unittest.cc',
         'common/ipc_sync_channel_unittest.cc',
         'common/ipc_sync_message_unittest.cc',
         'common/ipc_sync_message_unittest.h',
         'common/json_value_serializer_unittest.cc',
         'common/mru_cache_unittest.cc',
         'common/net/url_util_unittest.cc',
         'common/notification_service_unittest.cc',
         'common/pref_member_unittest.cc',
         'common/pref_service_unittest.cc',
+        'common/process_watcher_unittest.cc',
         'common/property_bag_unittest.cc',
         'common/resource_dispatcher_unittest.cc',
         'common/time_format_unittest.cc',
         'common/worker_thread_ticker_unittest.cc',
         'common/zip_unittest.cc',
         'renderer/audio_message_filter_unittest.cc',
         'renderer/extensions/extension_api_client_unittest.cc',
         'renderer/extensions/json_schema_unittest.cc',
         'renderer/net/render_dns_master_unittest.cc',
         'renderer/net/render_dns_queue_unittest.cc',
@@ skipping 1262 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'
         },
       ]
     }],
   ],  # 'conditions'
 }