Upstream most of the iOS WebUI support in ios/web/

ui/base/ui_base.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': [
     {
@@ skipping 344 matching lines @@
           # iOS only uses a subset of UI.
           'sources/': [
             ['exclude', '\\.(cc|mm)$'],
             ['include', '_ios\\.(cc|mm)$'],
             ['include', '(^|/)ios/'],
             ['include', '^l10n/'],
             ['include', '^layout'],
             ['include', '^page_transition_type'],
             ['include', '^resource/'],
             ['include', '^ui_base_'],
+            ['include', '^webui/'],
+            ['include', '^window_open_disposition\\.cc'],
           ],
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/CoreGraphics.framework',
             ],
           },
         }],
         ['use_aura==1', {
           'sources/': [
             ['exclude', 'clipboard/clipboard_mac.mm'],
@@ skipping 324 matching lines @@
            ],
            'variables': {
              'jni_gen_package': 'ui',
            },
            'includes': [ '../../build/jni_generator.gypi' ],
          },
        ],
     }],
   ],
 }