Disable WebShare on platforms other than android.

third_party/WebKit/Source/build/scripts/make_runtime_features.py

 #!/usr/bin/env python
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 31 matching lines @@
     valid_values = {
         'status': ['stable', 'experimental', 'test'],
     }
     defaults = {
         'condition': None,
         'custom': False,
         'depends_on': [],
         'feature_policy': None,
         'implied_by': [],
         'origin_trial_feature_name': None,
+        'origin_trial_os_whitelist': [],

[dglazkov, 2016/09/29 15:59:47]

just origin_trial_os? Also, will you need to modify this again a feature exits
origin trials?

Could this be somehow orthogonal to origin trial flags?

[Sam McNally, 2016/10/04 01:54:03]

Done.
When the origin trial ends, the previous approach for restricting platforms will
work again.
Runtime features are either on or off and origin trials can turn an off into an
on. To merge this into the existing per-platform controls we'd need another
state for runtime features that isn't affected by origin trials.

         'settable_from_internals': False,
         'status': None,
     }
 
     def __init__(self, in_file_path):
         super(RuntimeFeatureWriter, self).__init__(in_file_path)
         self._outputs = {(self.class_name + '.h'): self.generate_header,
                          (self.class_name + '.cpp'): self.generate_implementation,
                         }
 
@@ skipping 28 matching lines @@
     def generate_header(self):
         return self._template_inputs()
 
     @template_expander.use_jinja(class_name + '.cpp.tmpl')
     def generate_implementation(self):
         return self._template_inputs()
 
 
 if __name__ == '__main__':
     in_generator.Maker(RuntimeFeatureWriter).main(sys.argv)