Add IDL parsing of FeaturePolicy extended attribute

third_party/WebKit/Source/bindings/scripts/v8_utilities.py

 # 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
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 385 matching lines @@
     The returned function checks if the IDL member should be enabled.
     Given extended attribute OriginTrialEnabled=FeatureName, return:
         OriginTrials::{featureName}Enabled
 
     If the OriginTrialEnabled extended attribute is found, the includes are
     also updated as a side-effect.
     """
     extended_attributes = definition_or_member.extended_attributes
     is_origin_trial_enabled = 'OriginTrialEnabled' in extended_attributes
 
-    if (is_origin_trial_enabled and 'RuntimeEnabled' in extended_attributes):
+    if is_origin_trial_enabled and 'RuntimeEnabled' in extended_attributes:
         raise Exception('[OriginTrialEnabled] and [RuntimeEnabled] must '
                         'not be specified on the same definition: '
                         '%s.%s' % (definition_or_member.idl_name, definition_or_member.name))
 
     if is_origin_trial_enabled:
         trial_name = extended_attributes['OriginTrialEnabled']
         return 'OriginTrials::%sEnabled' % uncapitalize(trial_name)
 
+    is_feature_policy_enabled = 'FeaturePolicy' in extended_attributes
+
+    if is_feature_policy_enabled and 'RuntimeEnabled' in extended_attributes:
+        raise Exception('[FeaturePolicy] and [RuntimeEnabled] must '
+                        'not be specified on the same definition: '
+                        '%s.%s' % (definition_or_member.idl_name, definition_or_member.name))
+
+    if is_feature_policy_enabled:
+        includes.add('bindings/core/v8/ScriptState.h')
+        includes.add('platform/feature_policy/FeaturePolicy.h')
+
+        trial_name = extended_attributes['FeaturePolicy']
+        return 'FeaturePolicy::%sEnabled' % uncapitalize(trial_name)
+
     return None
 
 
 def origin_trial_feature_name(definition_or_member):
     extended_attributes = definition_or_member.extended_attributes
-    if 'OriginTrialEnabled' not in extended_attributes:
-        return None
-    return extended_attributes['OriginTrialEnabled']
+    return extended_attributes.get('OriginTrialEnabled') or extended_attributes.get('FeaturePolicy')
 
 
 def runtime_feature_name(definition_or_member):
     extended_attributes = definition_or_member.extended_attributes
     if 'RuntimeEnabled' not in extended_attributes:
         return None
     return extended_attributes['RuntimeEnabled']
 
 
 # [RuntimeEnabled]
@@ skipping 199 matching lines @@
     except StopIteration:
         return None
 
 
 IdlInterface.indexed_property_getter = property(indexed_property_getter)
 IdlInterface.indexed_property_setter = property(indexed_property_setter)
 IdlInterface.indexed_property_deleter = property(indexed_property_deleter)
 IdlInterface.named_property_getter = property(named_property_getter)
 IdlInterface.named_property_setter = property(named_property_setter)
 IdlInterface.named_property_deleter = property(named_property_deleter)