Move image loading out of C++ into Dart

sky/engine/bindings/scripts/dart_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 136 matching lines @@
 ################################################################################
 
 def cpp_value(interface, method, number_of_arguments):
     def cpp_argument(argument):
         argument_name = dart_types.check_reserved_name(argument.name)
         idl_type = argument.idl_type
 
         if idl_type.is_typed_array_type:
             return '%s.get()' % argument_name
 
+        # TODO(eseidel): This should check cpp_type.endswith('Handle')
+        if idl_type.name == 'MojoDataPipeConsumer':
+            return '%s.Pass()' % argument_name
+
         if idl_type.name == 'EventListener':
             if (interface.name == 'EventTarget' and
                 method.name == 'removeEventListener'):
                 # FIXME: remove this special case by moving get() into
                 # EventTarget::removeEventListener
                 return '%s.get()' % argument_name
             return argument.name
-        if (idl_type.is_callback_interface or
-            idl_type.name in ['NodeFilter', 'XPathNSResolver']):
-            # FIXME: remove this special case
+        if idl_type.is_callback_interface:
             return '%s.release()' % argument_name
         return argument_name
 
     # Truncate omitted optional arguments
     arguments = method.arguments[:number_of_arguments]
     if method.is_constructor:
         call_with_values = interface.extended_attributes.get('ConstructorCallWith')
     else:
         call_with_values = method.extended_attributes.get('CallWith')
     cpp_arguments = DartUtilities.call_with_arguments(call_with_values)
@@ skipping 60 matching lines @@
     # removeEventListener methods that should be added in somewhere.
     # There is also some logic in systemnative.py to force a null check
     # for the useCapture argument of those same methods that we may need to
     # pull over.
     null_check = ((argument.is_optional and idl_type.is_callback_interface) or
                   (argument.default_value and argument.default_value.is_null))
 
     return idl_type.dart_value_to_local_cpp_value(
         extended_attributes, name, null_check, has_type_checking_interface,
         index=index, auto_scope=auto_scope)