Support custom to native conversions.

lib/dom/scripts/generator.py

Index: lib/dom/scripts/generator.py
diff --git a/lib/dom/scripts/generator.py b/lib/dom/scripts/generator.py
index 66ea4a6480adc42b4d2b9cd34f7ead20f137832b..275bae51e362ecbd00f5ea98b33133f2651dacdf 100644
--- a/lib/dom/scripts/generator.py
+++ b/lib/dom/scripts/generator.py
@@ -427,13 +427,13 @@ def TypeName(type_ids, interface):
 class IDLTypeInfo(object):
   def __init__(self, idl_type, dart_type=None,
                native_type=None, ref_counted=True,
-               has_dart_wrapper=True,
+               custom_to_native=False,
                custom_to_dart=False, conversion_includes=[]):
     self._idl_type = idl_type
     self._dart_type = dart_type
     self._native_type = native_type
     self._ref_counted = ref_counted
-    self._has_dart_wrapper = has_dart_wrapper
+    self._custom_to_native = custom_to_native
     self._custom_to_dart = custom_to_dart
     self._conversion_includes = conversion_includes + [idl_type]
 
@@ -450,11 +450,12 @@ class IDLTypeInfo(object):
     native_type = self.native_type()
     if self._ref_counted:
       native_type = 'RefPtr< %s >' % native_type
-    if self._has_dart_wrapper:
-      wrapper_type = 'Dart%s' % self.idl_type()
-      adapter_type = 'ParameterAdapter<%s, %s>' % (native_type, wrapper_type)
-      return (adapter_type, '"%s.h"' % wrapper_type)
-    return ('ParameterAdapter< %s >' % native_type, '"%s.h"' % self._idl_type)
+    wrapper_type = 'Dart%s' % self.idl_type()
+    adapter_type = 'ParameterAdapter<%s, %s>' % (native_type, wrapper_type)
+    return (adapter_type, '"%s.h"' % wrapper_type)
+
+  def custom_to_native(self):
+    return self._custom_to_native
 
   def parameter_type(self):
     return '%s*' % self.native_type()
@@ -642,13 +643,13 @@ _idl_type_registry = {
     'DOMStringMap': IDLTypeInfo('DOMStringMap', dart_type='Map<String, String>'),
     'DOMWindow': IDLTypeInfo('DOMWindow', custom_to_dart=True),
     'Element': IDLTypeInfo('Element', custom_to_dart=True),
-    'EventListener': IDLTypeInfo('EventListener', has_dart_wrapper=False),
-    'EventTarget': IDLTypeInfo('EventTarget', has_dart_wrapper=False),
+    'EventListener': IDLTypeInfo('EventListener', custom_to_native=True),
+    'EventTarget': IDLTypeInfo('EventTarget', custom_to_native=True),
     'HTMLElement': IDLTypeInfo('HTMLElement', custom_to_dart=True),
-    'IDBAny': IDLTypeInfo('IDBAny', dart_type='Dynamic', has_dart_wrapper=False),
-    'IDBKey': IDLTypeInfo('IDBKey', dart_type='Dynamic', has_dart_wrapper=False),
-    'MediaQueryListListener': IDLTypeInfo('MediaQueryListListener', has_dart_wrapper=False),
-    'OptionsObject': IDLTypeInfo('OptionsObject', has_dart_wrapper=False),
+    'IDBAny': IDLTypeInfo('IDBAny', dart_type='Dynamic', custom_to_native=True),
+    'IDBKey': IDLTypeInfo('IDBKey', dart_type='Dynamic', custom_to_native=True),
+    'MediaQueryListListener': IDLTypeInfo('MediaQueryListListener', custom_to_native=True),
+    'OptionsObject': IDLTypeInfo('OptionsObject', custom_to_native=True),
     'StyleSheet': IDLTypeInfo('StyleSheet', conversion_includes=['CSSStyleSheet']),
     'SVGElement': IDLTypeInfo('SVGElement', custom_to_dart=True),