Add battery_status to WATCHLISTS.

WATCHLISTS

 # Copyright (c) 2013 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.
 
 # Watchlist Rules
 # Refer: http://dev.chromium.org/developers/contributing-code/watchlists
 
 # IMPORTANT: The regular expression filepath is tested against each path using
 # re.search, so it is not usually necessary to add .*.
 
@@ skipping 238 matching lines @@
     },
     'fragment_layout': {
       'filepath': 'Source/core/rendering/.*(FlowThread|MultiCol|Region)' \
                   '|Source/core/rendering/ColumnInfo' \
                   '|LayoutTests/.*/multicol/' \
                   '|LayoutTests/.*/regions/'
     },
     'table_layout': {
       'filepath': 'Source/core/rendering/.*Table'
     },
+    'battery_status': {
+      'filepath': 'Source/modules/battery/' \
+                  '|LayoutTests/battery-status/'
+    },
   },
 
   'WATCHLISTS': {
     'accessibility':['dmazzoni@chromium.org',
                      'aboxhall@chromium.org'],
     'animations': ['alancutter@chromium.org',
                    'alexis.menard@intel.com',
                    'dstockwell@chromium.org',
                    'ericwilligers@chromium.org',
                    'mikelawther@chromium.org',
@@ skipping 112 matching lines @@
     'spellcheck' : [ 'groby+blinkspell@chromium.org' ],
     'device_orientation': [ 'timvolodine@chromium.org', 'mvanouwerkerk+watch@chromium.org', 'ch.dumez@samsung.com' ],
     'activity_logger': [ 'watchdog-blink-watchlist@google.com' ],
     'webp': [ 'urvang@google.com',
               'jzern@chromium.org',
               'skal@google.com',
               'vikasa@google.com' ],
     'css_grid_layout': [ 'svillar@igalia.com', 'jfernandez@igalia.com', 'rego@igalia.com' ],
     'fragment_layout': [ 'mstensho+blink@opera.com' ],
     'table_layout': [ 'mstensho+blink@opera.com' ],
+    'battery_status': [ 'timvolodine@chromium.org' ],
   },
 }