[Origin Trials] Install origin trial bindings on V8 context conditionally

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 384 matching lines @@
     if is_origin_trial_enabled:
         includes.add('core/inspector/ConsoleMessage.h')
         includes.add('core/origin_trials/OriginTrials.h')
 
         trial_name = extended_attributes['OriginTrialEnabled']
         return 'OriginTrials::%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']
+
+
 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]
 def runtime_enabled_function_name(definition_or_member):
     """Returns the name of the RuntimeEnabledFeatures function.
@@ skipping 197 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)