Create fewer local v8::TryCatch objects in generated bindings code

Source/bindings/scripts/v8_interface.py

Index: Source/bindings/scripts/v8_interface.py
diff --git a/Source/bindings/scripts/v8_interface.py b/Source/bindings/scripts/v8_interface.py
index 405ada7b874bb1bbc7999c93a270bd2c77f6e927..4a33f8d5d7d5d4b4c0511d38b9e7a43e96eb8f1f 100644
--- a/Source/bindings/scripts/v8_interface.py
+++ b/Source/bindings/scripts/v8_interface.py
@@ -464,10 +464,14 @@ def overload_check_argument(index, argument):
 
 # [Constructor]
 def generate_constructor(interface, constructor):
+    generated_arguments = [constructor_argument(interface, constructor, argument, index)
+                           for index, argument in enumerate(constructor.arguments)]
+
     return {
         'argument_list': constructor_argument_list(interface, constructor),
-        'arguments': [constructor_argument(interface, constructor, argument, index)
-                      for index, argument in enumerate(constructor.arguments)],
+        'arguments': generated_arguments,
+        'arguments_need_try_catch': any(
+            v8_methods.argument_needs_try_catch(argument) for argument in generated_arguments),

[Nils Barth (inactive), 2014/05/07 03:02:19]

Could you add one more linebreak here?
(So for ... on separate line.)

         'cpp_type': cpp_template_type(
             cpp_ptr_type('RefPtr', 'RawPtr', gc_type(interface)),
             cpp_name(interface)),
@@ -504,8 +508,14 @@ def constructor_argument_list(interface, constructor):
 
 
 def constructor_argument(interface, constructor, argument, index):
+    extended_attributes = argument.extended_attributes
     idl_type = argument.idl_type
+    is_variadic_wrapper_type = argument.is_variadic and idl_type.is_wrapper_type
+
     return {
+        'cpp_type': idl_type.cpp_type_args(extended_attributes=extended_attributes,
+                                           used_as_argument=not is_variadic_wrapper_type,
+                                           used_in_cpp_sequence=is_variadic_wrapper_type),
         'cpp_value':
             v8_methods.cpp_value(interface, constructor, index),
         'has_default': 'Default' in argument.extended_attributes,