Implement Web Restrictions in WebView.

components/supervised_user_error_page.gypi

 {
   'targets': [
     {
-      # GN version: //components/supervused_user_error_page
+      # GN version: //components/supervised_user_error_page
       'target_name': 'supervised_user_error_page',
       'type': 'static_library',
       'dependencies': [
         'components_resources.gyp:components_resources',
         'components_strings.gyp:components_strings',
         '../base/base.gyp:base',
         '../ui/base/ui_base.gyp:ui_base'
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'supervised_user_error_page/supervised_user_error_page.cc',
         'supervised_user_error_page/supervised_user_error_page.h',
       ],
     },
   ],
+  'conditions': [
+    ['OS == "android"', {
+      'targets': [
+        {
+          # GN version: //components/supervised_user_error_page:gin
+          'target_name': 'supervised_user_error_page_gin',
+          'type': 'static_library',
+          'dependencies': [
+            'components.gyp:web_restrictions_interfaces',
+            '../content/content.gyp:content_renderer',
+          ],
+          'sources': [
+            'supervised_user_error_page/supervised_user_gin_wrapper.cc',
+            'supervised_user_error_page/supervised_user_gin_wrapper.h',
+          ],
+        }
+      ],
+    }],
+  ],
 }