Introduce SmallTypedArray IDL type and use it for bufferSubData

Source/bindings/scripts/v8_methods.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 222 matching lines @@
         'idl_type': idl_type.base_type,
         'idl_type_object': idl_type,
         'index': index,
         'is_callback_function': idl_type.is_callback_function,
         'is_callback_interface': idl_type.is_callback_interface,
         # FIXME: Remove generic 'Dictionary' special-casing
         'is_dictionary': idl_type.is_dictionary or idl_type.base_type == 'Dictionary',
         'is_explicit_nullable': idl_type.is_explicit_nullable,
         'is_nullable': idl_type.is_nullable,
         'is_optional': argument.is_optional,
+        'is_small_typed_array': idl_type.name == 'SmallTypedArray',
         'is_variadic': argument.is_variadic,
         'is_variadic_wrapper_type': is_variadic_wrapper_type,
         'is_wrapper_type': idl_type.is_wrapper_type,
         'name': argument.name,
         'private_script_cpp_value_to_v8_value': idl_type.cpp_value_to_v8_value(
             argument.name, isolate='scriptState->isolate()',
             creation_context='scriptState->context()->Global()'),
         'use_permissive_dictionary_conversion': 'PermissiveDictionaryConversion' in extended_attributes,
         'v8_set_return_value': v8_set_return_value(interface.name, method, this_cpp_value),
         'v8_set_return_value_for_main_world': v8_set_return_value(interface.name, method, this_cpp_value, for_main_world=True),
@@ skipping 14 matching lines @@
 
 ################################################################################
 # Value handling
 ################################################################################
 
 def cpp_value(interface, method, number_of_arguments):
     def cpp_argument(argument):
         idl_type = argument.idl_type
         if idl_type.name == 'EventListener':
             return argument.name
+        if idl_type.name == 'SmallTypedArray':
+            return '%s.first, %s.second' % (argument.name, argument.name)
         if (idl_type.name in ['NodeFilter', 'NodeFilterOrNull',
                               'XPathNSResolver', 'XPathNSResolverOrNull']):
             # FIXME: remove this special case
             return '%s.release()' % argument.name
         return argument.name
 
     # Truncate omitted optional arguments
     arguments = method.arguments[:number_of_arguments]
     cpp_arguments = []
     if 'ImplementedInPrivateScript' in method.extended_attributes:
@@ skipping 165 matching lines @@
     return method.idl_type and method.idl_type.name == 'Promise'
 
 IdlOperation.returns_promise = property(method_returns_promise)
 
 
 def argument_conversion_needs_exception_state(method, argument):
     idl_type = argument.idl_type
     return (idl_type.v8_conversion_needs_exception_state or
             argument.is_variadic or
             (method.returns_promise and idl_type.is_string_type))