Update Valgrind watchlist

WATCHLISTS

 # Copyright (c) 2006-2009 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.
 
 # Watchlist Rules
 # Refer: http://dev.chromium.org/developers/contributing-code/watchlists
 
 
 {
   'WATCHLIST_DEFINITIONS': {
     'this_file': {
         'filepath': '^WATCHLISTS$',
     },
     'valgrind': {
-      'filepath': 'tools/valgrind/.*',
+      'filepath': 'valgrind',
     },
     'purify': {
       'filepath': 'purify',
     },
     'mac': {
       'filepath': 'cocoa|\.mm$|(_mac|_posix)\.(cc|h)$',
     },
     'base': {
       'filepath': 'base/.*',
     },
@@ skipping 53 matching lines @@
     'tab_contents': ['brettw@chromium.org'],
     'webkit': ['darin@chromium.org'],
     'plugin': ['darin@chromium.org'],
     'extension': ['erikkay@chromium.org'],
     'purify': ['erikkay@chromium.org'],
     'net': ['darin@chromium.org', 'willchan@chromium.org'],
     'installer': ['kuchhal@chromium.org'],
     'importer': ['kuchhal@chromium.org'],
   },
 }