Add myself to WATCHLISTS for sync

WATCHLISTS

 # 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.
 
 # 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 945 matching lines @@
                        'serviceworker-reviews@chromium.org'],
     'site_instance': ['creis+watch@chromium.org', 'ajwong+watch@chromium.org',
                       'nasko+codewatch@chromium.org'],
     'spellcheck': ['groby+spellwatch@chromium.org',
                    'rlp+watch@chromium.org',
                    'rouslan+spellwatch@chromium.org'],
     'streams': ['zork+watch@chromium.org'],
     'sync': ['haitaol+watch@chromium.org',
              'tim+watch@chromium.org',
              'maniscalco+watch@chromium.org',
+             'pvalenzuela+watch@chromium.org',
              'zea+watch@chromium.org'],
     'syncfs': ['kinuko+fileapi@chromium.org',
                'nhiroki@chromium.org',
                'tzik@chromium.org'],
     'sync_proto': ['albertb+watch@chromium.org'],
     'tab_capture': ['miu+watch@chromium.org'],
     'tab_contents': ['avi@chromium.org',
                      'creis+watch@chromium.org', 'ajwong+watch@chromium.org'],
     'tab_media_indicators': ['miu+watch@chromium.org'],
     'tcmalloc': ['dmikurube+memory@chromium.org'],
@@ skipping 27 matching lines @@
                      'mcasas+watch@chromium.org',
                      'posciak+watch@chromium.org'],
     'website_settings': ['markusheintz@chromium.org'],
     'windows_sandboxing': ['wfh+watch@chromium.org'],
     'worker': ['jam@chromium.org'],
     'x11': ['derat+watch@chromium.org',
             'sadrul@chromium.org',
             'yusukes+watch@chromium.org'],
   },
 }