Add Native Client SDK docs to nacl watchlist

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 348 matching lines @@
                   '|chrome/browser/ui/webui/metrics_handler'\
                   '|content/browser/user_metrics.cc'\
                   '|content/public/browser/user_metrics.h'\
                   '|tools/metrics/'
     },
     'mouse_lock': {
       'filepath': 'mouse_lock',
     },
     'nacl': {
       'filepath': 'chrome/nacl/|chrome/test/nacl/|'\
-        'chrome/browser/nacl_host/|chrome/common/nacl',
+        'chrome/browser/nacl_host/|chrome/common/nacl|'\
+        'native_client_sdk/src/doc/',
     },
     'native_client_sdk': {
       'filepath': '^native_client_sdk/',
     },
     'net': {
       'filepath': 'net/',
     },
     'net_error_list': {
       'filepath': 'net/base/net_error_list.h',
     },
@@ skipping 414 matching lines @@
     'views': ['tfarina@chromium.org'],
     'views_core': ['ben+watch@chromium.org'],
     'website_settings': ['markusheintz@chromium.org'],
     'webkit': ['darin-cc@chromium.org'],
     'worker': ['jam@chromium.org'],
     'x11': ['derat+watch@chromium.org',
             'sadrul@chromium.org',
             'yusukes+watch@chromium.org'],
   },
 }