Move the iOS user agent functions to ios/web/public.

ios/ios_web.gyp

Index: ios/ios_web.gyp
diff --git a/ios/ios_web.gyp b/ios/ios_web.gyp
deleted file mode 100644
index 6f3f2d4c2912ff3e8e71cbfe87fc4b2537b74f5f..0000000000000000000000000000000000000000
--- a/ios/ios_web.gyp
+++ /dev/null
@@ -1,24 +0,0 @@
-# Copyright 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.
-{
-  'variables': {
-    'chromium_code': 1,
-   },
-  'targets': [
-    {
-      'target_name': 'ios_provider_web',
-      'type': 'none',
-      'include_dirs': [
-        '..',
-      ],
-      'sources': [
-        'public/provider/web/web_state.h',
-        'public/provider/web/web_state_user_data.h',
-      ],
-      'dependencies': [
-        'ios_base.gyp:ios_consumer_base',
-      ],
-    },
-  ],
-}