Add property to CssStyleDeclaration to detect if a CSS value is available.

tools/dom/scripts/systemnative.py

 #!/usr/bin/python
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This module provides shared functionality for the systems to generate
 native binding from the IDL database."""
 
 import emitter
 import os
@@ skipping 361 matching lines @@
     cpp_type_name = interface_name
   return cpp_type_name
 
 def DeriveQualifiedName(library_name, name):
     return library_name + "." + name
 
 def DeriveBlinkClassName(name):
     return "Blink" + name
 
 def DeriveResolverString(interface_id, operation_id, native_suffix, type_ids, database, is_custom):
+    if interface_id == 'CSSStyleDeclaration' and operation_id == '__getter__':
+      # Dirty hack to be more nicely implemented with new generator scripts.
+      return "CSSStyleDeclaration___getter___Callback_RESOLVER_STRING_1_DOMString"

[Leaf, 2014/08/06 17:53:49]

Is it possible to use the pre-existing dirty-hack (_cpp_resolver_string_map) for
this instead?

     type_string = \
         "_".join(map(lambda type_id : TypeIdToBlinkName(type_id, database), type_ids))
     if native_suffix:
         operation_id = "%s_%s" % (operation_id, native_suffix)
     if is_custom:
         components = \
             [TypeIdToBlinkName(interface_id, database), operation_id]
     else:
         components = \
             [TypeIdToBlinkName(interface_id, database), operation_id,
@@ skipping 1638 matching lines @@
     e.Emit("};\n");
     e.Emit('\n');
     e.Emit('} // namespace WebCore\n');
 
 def _IsOptionalStringArgumentInInitEventMethod(interface, operation, argument):
   return (
       interface.id.endswith('Event') and
       operation.id.startswith('init') and
       argument.ext_attrs.get('Default') == 'Undefined' and
       argument.type.id == 'DOMString')