IDL: Use IdlArrayOrSequenceType for array/sequence IDL types

Source/bindings/scripts/v8_methods.py

Index: Source/bindings/scripts/v8_methods.py
diff --git a/Source/bindings/scripts/v8_methods.py b/Source/bindings/scripts/v8_methods.py
index 5f639d154f82c1dbb438bcdbbb8a8f4f6a59283b..53b4d353f52de89cae9527856f629d310c055461 100644
--- a/Source/bindings/scripts/v8_methods.py
+++ b/Source/bindings/scripts/v8_methods.py
@@ -53,7 +53,7 @@ CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES = frozenset([
 
 def argument_needs_try_catch(argument, return_promise):
     idl_type = argument.idl_type
-    base_type = not idl_type.native_array_element_type and idl_type.base_type
+    base_type = idl_type.base_type
 
     return not (
         # These cases are handled by separate code paths in the
@@ -233,7 +233,7 @@ def argument_context(interface, method, argument, index):
              has_extended_attribute_value(method, 'TypeChecking', 'Unrestricted')) and
             idl_type.name in ('Float', 'Double'),
         # Dictionary is special-cased, but arrays and sequences shouldn't be
-        'idl_type': not idl_type.native_array_element_type and idl_type.base_type,
+        'idl_type': idl_type.base_type,
         'idl_type_object': idl_type,
         'index': index,
         'is_clamp': 'Clamp' in extended_attributes,