Improve handling of failed integer type conversions.

Source/bindings/scripts/unstable/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 39 matching lines @@
     # [CheckSecurity]
     is_check_security_for_node = 'CheckSecurity' in extended_attributes
     if is_check_security_for_node:
         includes.add('bindings/v8/BindingSecurity.h')
     # [Custom]
     has_custom_getter = ('Custom' in extended_attributes and
                          extended_attributes['Custom'] in [None, 'Getter'])
     has_custom_setter = (not attribute.is_read_only and
                          'Custom' in extended_attributes and
                          extended_attributes['Custom'] in [None, 'Setter'])
+
+    has_strict_type_checking = (
+        'StrictTypeChecking' in extended_attributes and
+        v8_types.is_interface_type(idl_type))
+
+    is_setter_raises_exception = (
+        'RaisesException' in extended_attributes and
+        extended_attributes['RaisesException'] in [None, 'Setter'])
+
     # [Reflect]
     is_reflect = 'Reflect' in extended_attributes
     if is_reflect:
         includes.add('core/dom/custom/CustomElementCallbackDispatcher.h')
 
     if (idl_type == 'EventHandler' and
         interface.name in ['Window', 'WorkerGlobalScope'] and
         attribute.name == 'onerror'):
         includes.add('bindings/v8/V8ErrorHandler.h')
 
     contents = {
         'access_control_list': access_control_list(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]
         'cached_attribute_validation_method': extended_attributes.get('CachedAttribute'),
         'conditional_string': v8_utilities.conditional_string(attribute),
         'constructor_type': v8_types.constructor_type(idl_type)
                             if is_constructor_attribute(attribute) else None,
         'cpp_name': cpp_name(attribute),
         'cpp_type': v8_types.cpp_type(idl_type),
         'deprecate_as': v8_utilities.deprecate_as(attribute),  # [DeprecateAs]
         'enum_validation_expression':
             v8_utilities.enum_validation_expression(idl_type),
         'has_custom_getter': has_custom_getter,
         'has_custom_setter': has_custom_setter,
-        'has_strict_type_checking': (
-            'StrictTypeChecking' in extended_attributes and
-            v8_types.is_interface_type(idl_type)),
+        'has_strict_type_checking': has_strict_type_checking,
         'idl_type': idl_type,
         'is_call_with_execution_context': v8_utilities.has_extended_attribute_value(attribute, 'CallWith', 'ExecutionContext'),
         'is_check_security_for_node': is_check_security_for_node,
         'is_expose_js_accessors': 'ExposeJSAccessors' in extended_attributes,
         'is_getter_raises_exception': (  # [RaisesException]
             'RaisesException' in extended_attributes and
             extended_attributes['RaisesException'] in [None, 'Getter']),
         'is_initialized_by_event_constructor':
             'InitializedByEventConstructor' in extended_attributes,
         'is_keep_alive_for_gc': is_keep_alive_for_gc(attribute),
         'is_nullable': attribute.is_nullable,
         'is_per_world_bindings': 'PerWorldBindings' in extended_attributes,
         'is_read_only': attribute.is_read_only,
         'is_reflect': is_reflect,
         'is_replaceable': 'Replaceable' in attribute.extended_attributes,
-        'is_setter_raises_exception': (
-            'RaisesException' in extended_attributes and
-            extended_attributes['RaisesException'] in [None, 'Setter']),
+        'is_setter_raises_exception': is_setter_raises_exception,
+        'has_setter_exception_state': (
+            is_setter_raises_exception or has_strict_type_checking or
+            v8_types.is_integer_type(idl_type)),
         'is_static': attribute.is_static,
         'is_unforgeable': 'Unforgeable' in extended_attributes,
         'measure_as': v8_utilities.measure_as(attribute),  # [MeasureAs]
         'name': attribute.name,
         'per_context_enabled_function': v8_utilities.per_context_enabled_function_name(attribute),  # [PerContextEnabled]
         'property_attributes': property_attributes(attribute),
         'setter_callback': setter_callback_name(interface, attribute),
         'v8_type': v8_types.v8_type(idl_type),
         'runtime_enabled_function': v8_utilities.runtime_enabled_function_name(attribute),  # [RuntimeEnabled]
         'world_suffixes': ['', 'ForMainWorld']
@@ skipping 206 matching lines @@
         property_attributes_list.append('v8::DontEnum')
     if 'Unforgeable' in extended_attributes:
         property_attributes_list.append('v8::DontDelete')
     return property_attributes_list or ['v8::None']
 
 
 # Constructors
 
 def is_constructor_attribute(attribute):
     return attribute.idl_type.endswith('Constructor')