bindings: Supports per-member [Exposed] for attributes on prototype.

Source/bindings/scripts/v8_interface.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 # coding=utf-8
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
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 #     * Redistributions of source code must retain the above copyright
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 #     * Redistributions in binary form must reproduce the above
@@ skipping 280 matching lines @@
             not (attribute['is_static'] or
                  attribute['runtime_enabled_function']) and
             attribute['should_be_exposed_to_script']
             for attribute in attributes),
         'has_attribute_configuration': any(
              not (attribute['is_expose_js_accessors'] or
                   attribute['is_static'] or
                   attribute['runtime_enabled_function'])
              and attribute['should_be_exposed_to_script']
              for attribute in attributes),
-        'has_conditional_attributes': has_conditional_attributes,
         'has_constructor_attributes': any(attribute['constructor_type'] for attribute in attributes),
         'has_replaceable_attributes': any(attribute['is_replaceable'] for attribute in attributes),
     })
 
     # Methods
     methods = []
     if interface.original_interface:
         methods.extend([v8_methods.method_context(interface, operation, is_visible=False)
                         for operation in interface.original_interface.operations
                         if operation.name])
@@ skipping 241 matching lines @@
         'has_origin_safe_method_setter': any(
             method['is_check_security_for_frame'] and not method['is_read_only']
             for method in methods),
         'has_private_script': any(attribute['is_implemented_in_private_script'] for attribute in attributes) or
             any(method['is_implemented_in_private_script'] for method in methods),
         'iterator_method': iterator_method,
         'method_configuration_methods': method_configuration_methods,
         'methods': methods,
     })
 
+    # Conditionally enabled members
+    has_conditional_attributes_on_instance = any(
+        attribute['exposed_test'] and attribute['on_instance']
+        for attribute in attributes)
+    has_conditional_attributes_on_prototype = any(
+        attribute['exposed_test'] and attribute['on_prototype']
+        for attribute in attributes)
+    context.update({
+        'has_conditional_attributes_on_instance':
+            has_conditional_attributes_on_instance,
+        'has_conditional_attributes_on_prototype':
+            has_conditional_attributes_on_prototype,
+        'has_conditional_member_on_prototype': (
+            unscopeables or

[bashi, 2015/06/23 08:21:03]

It seems that |unscopeables| do nothing with conditionally enabled members
(apart from how we handle them). It might be better to keep them be separated?

[Yuki, 2015/06/23 08:36:05]

Good catch!  Done.

+            conditionally_enabled_methods or
+            has_conditional_attributes_on_prototype),
+    })
+
     context.update({
         'indexed_property_getter': property_getter(interface.indexed_property_getter, ['index']),
         'indexed_property_setter': property_setter(interface.indexed_property_setter, interface),
         'indexed_property_deleter': property_deleter(interface.indexed_property_deleter),
         'is_override_builtins': 'OverrideBuiltins' in extended_attributes,
         'named_property_getter': property_getter(interface.named_property_getter, ['propertyName']),
         'named_property_setter': property_setter(interface.named_property_setter, interface),
         'named_property_deleter': property_deleter(interface.named_property_deleter),
     })
 
@@ skipping 769 matching lines @@
 
     extended_attributes = deleter.extended_attributes
     idl_type = deleter.idl_type
     is_call_with_script_state = v8_utilities.has_extended_attribute_value(deleter, 'CallWith', 'ScriptState')
     return {
         'is_call_with_script_state': is_call_with_script_state,
         'is_custom': 'Custom' in extended_attributes,
         'is_raises_exception': 'RaisesException' in extended_attributes,
         'name': cpp_name(deleter),
     }