Revert of bindings: Makes almost all attributes accessor-type properties.

Source/bindings/scripts/v8_attributes.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 47 matching lines @@
     is_check_security_for_frame = (
         has_extended_attribute_value(interface, 'CheckSecurity', 'Frame') and
         not is_do_not_check_security)
     is_check_security_for_node = (
         has_extended_attribute_value(attribute, 'CheckSecurity', 'Node'))
     is_check_security_for_window = (
         has_extended_attribute_value(interface, 'CheckSecurity', 'Window') and
         not is_do_not_check_security)
     if is_check_security_for_frame or is_check_security_for_node or is_check_security_for_window:
         includes.add('bindings/core/v8/BindingSecurity.h')
-    # [Constructor]
-    # TODO(yukishiino): Constructors are much like methods although constructors
-    # are not methods.  Constructors must be data-type properties, and we can
-    # support them as a kind of methods.
-    constructor_type = idl_type.constructor_type_name if is_constructor_attribute(attribute) else None
     # [CustomElementCallbacks], [Reflect]
     is_custom_element_callbacks = 'CustomElementCallbacks' in extended_attributes
     is_reflect = 'Reflect' in extended_attributes
     if is_custom_element_callbacks or is_reflect:
         includes.add('core/dom/custom/CustomElementProcessingStack.h')
     # [ImplementedInPrivateScript]
     is_implemented_in_private_script = 'ImplementedInPrivateScript' in extended_attributes
     if is_implemented_in_private_script:
         includes.add('bindings/core/v8/PrivateScriptRunner.h')
         includes.add('core/frame/LocalFrame.h')
@@ skipping 15 matching lines @@
         includes.add('bindings/core/v8/V8HiddenValue.h')
 
     context = {
         'access_control_list': access_control_list(interface, attribute),
         'activity_logging_world_list_for_getter': v8_utilities.activity_logging_world_list(attribute, 'Getter'),  # [ActivityLogging]
         'activity_logging_world_list_for_setter': v8_utilities.activity_logging_world_list(attribute, 'Setter'),  # [ActivityLogging]
         'activity_logging_world_check': v8_utilities.activity_logging_world_check(attribute),  # [ActivityLogging]
         'argument_cpp_type': idl_type.cpp_type_args(used_as_rvalue_type=True),
         'cached_attribute_validation_method': cached_attribute_validation_method,
         'conditional_string': v8_utilities.conditional_string(attribute),
-        'constructor_type': constructor_type,
+        'constructor_type': idl_type.constructor_type_name
+                            if is_constructor_attribute(attribute) else None,
         'cpp_name': cpp_name(attribute),
         'cpp_type': idl_type.cpp_type,
         'cpp_type_initializer': idl_type.cpp_type_initializer,
         'deprecate_as': v8_utilities.deprecate_as(attribute),  # [DeprecateAs]
         'enum_type': idl_type.enum_type,
         'enum_values': idl_type.enum_values,
         'exposed_test': v8_utilities.exposed(attribute, interface),  # [Exposed]
         'has_custom_getter': has_custom_getter(attribute),
         'has_custom_setter': has_custom_setter(attribute),
         'has_setter': has_setter(attribute),
         'idl_type': str(idl_type),  # need trailing [] on array for Dictionary::ConversionContext::setConversionType
         'is_call_with_execution_context': has_extended_attribute_value(attribute, 'CallWith', 'ExecutionContext'),
         'is_call_with_script_state': has_extended_attribute_value(attribute, 'CallWith', 'ScriptState'),
         'is_check_security_for_frame': is_check_security_for_frame,
         'is_check_security_for_node': is_check_security_for_node,
         'is_check_security_for_window': is_check_security_for_window,
         'is_custom_element_callbacks': is_custom_element_callbacks,
-        # TODO(yukishiino): Make all DOM attributes accessor-type properties.
-        'is_data_type_property': constructor_type or interface.name == 'Window',
+        'is_expose_js_accessors': is_expose_js_accessors(interface, attribute),
         'is_getter_raises_exception':  # [RaisesException]
             'RaisesException' in extended_attributes and
             extended_attributes['RaisesException'] in (None, 'Getter'),
         'is_implemented_in_private_script': is_implemented_in_private_script,
         'is_keep_alive_for_gc': keep_alive_for_gc,
         'is_lenient_this': 'LenientThis' in extended_attributes,
         'is_nullable': idl_type.is_nullable,
         'is_explicit_nullable': idl_type.is_explicit_nullable,
         'is_partial_interface_member':
             'PartialInterfaceImplementedAs' in extended_attributes,
@@ skipping 349 matching lines @@
 
 
 # [Custom], [Custom=Setter]
 def has_custom_setter(attribute):
     extended_attributes = attribute.extended_attributes
     return (not attribute.is_read_only and
             'Custom' in extended_attributes and
             extended_attributes['Custom'] in [None, 'Setter'])
 
 
+# [ExposeJSAccessors]
+def is_expose_js_accessors(interface, attribute):
+    # Default behavior
+    is_accessor = True
+
+    if ('ExposeJSAccessors' in interface.extended_attributes and
+            'DoNotExposeJSAccessors' in interface.extended_attributes):
+        raise Exception('Both of ExposeJSAccessors and DoNotExposeJSAccessors are specified at a time in an interface: ' + interface.name)
+    if 'ExposeJSAccessors' in interface.extended_attributes:
+        is_accessor = True
+    if 'DoNotExposeJSAccessors' in interface.extended_attributes:
+        is_accessor = False
+
+    # Note that ExposeJSAccessors and DoNotExposeJSAccessors are more powerful
+    # than 'static', [Unforgeable] and [OverrideBuiltins].
+    if ('ExposeJSAccessors' in attribute.extended_attributes and
+            'DoNotExposeJSAccessors' in attribute.extended_attributes):
+        raise Exception('Both of ExposeJSAccessors and DoNotExposeJSAccessors are specified at a time on an attribute: ' + attribute.name + ' in an interface: ' + interface.name)
+    if 'ExposeJSAccessors' in attribute.extended_attributes:
+        return True
+    if 'DoNotExposeJSAccessors' in attribute.extended_attributes:
+        return False
+
+    # These attributes must not be accessors on prototype chains.
+    if (is_constructor_attribute(attribute) or
+            attribute.is_static or
+            is_unforgeable(interface, attribute) or
+            'OverrideBuiltins' in interface.extended_attributes):
+        return False
+
+    # The members of Window interface must be placed on the instance object.
+    if interface.name == 'Window':
+        return False
+
+    return is_accessor
+
+
 ################################################################################
 # Constructors
 ################################################################################
 
 idl_types.IdlType.constructor_type_name = property(
     # FIXME: replace this with a [ConstructorAttribute] extended attribute
     lambda self: strip_suffix(self.base_type, 'Constructor'))
 
 
 def is_constructor_attribute(attribute):
     # FIXME: replace this with [ConstructorAttribute] extended attribute
     return attribute.idl_type.name.endswith('Constructor')
 
 
 def update_constructor_attribute_context(interface, attribute, context):
     context['needs_constructor_getter_callback'] = context['measure_as'] or context['deprecate_as']
     # When the attribute name is the same as the interface name, do not generate
     # callback functions for each attribute and use
     # {{cpp_class}}ConstructorAttributeSetterCallback.  Otherwise, generate
     # a callback function in order to hard-code the attribute name.
     context['needs_constructor_setter_callback'] = context['name'] != context['constructor_type']