Upstream iOS web API.

ios/provider/ios_provider_web.gyp

 # Copyright 2014 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,
    },
   'targets': [
     {
       'target_name': 'ios_provider_web',
       'type': 'none',
       'include_dirs': [
         '../..',
       ],
       'sources': [
+        '../public/provider/web/navigation_manager.h',
         '../public/provider/web/web_state.h',
         '../public/provider/web/web_state_user_data.h',
       ],
       'dependencies': [
         '../ios_base.gyp:ios_consumer_base',
       ],
     },
   ],
 }