IDL compiler: [GarbageCollected] on other interface

Source/bindings/scripts/unstable/v8_types.py

Index: Source/bindings/scripts/unstable/v8_types.py
diff --git a/Source/bindings/scripts/unstable/v8_types.py b/Source/bindings/scripts/unstable/v8_types.py
index 5066aaa0d0b8906ba60f578f5d62514f7e3bec3f..ecd99d8d8bc7b2eb84e893fa5ee0e945a82f0634 100644
--- a/Source/bindings/scripts/unstable/v8_types.py
+++ b/Source/bindings/scripts/unstable/v8_types.py
@@ -289,6 +289,8 @@ def cpp_type(idl_type, extended_attributes=None, used_as_argument=False):
         implemented_as_class = implemented_as(idl_type)
         if used_as_argument:
             return implemented_as_class + '*'
+        if is_garbage_collected(idl_type):
+            return cpp_template_type('RefPtrWillBeRawPtr', implemented_as_class)
         return cpp_template_type('RefPtr', implemented_as_class)
     # Default, assume native type is a pointer with same type name as idl type
     return idl_type + '*'
@@ -307,6 +309,18 @@ def v8_type(interface_type):
     return 'V8' + interface_type
 
 
+# [GarbageCollected]
+garbage_collected_types = set()
+
+
+def is_garbage_collected(idl_type):
+    return idl_type in garbage_collected_types
+
+
+def set_garbage_collected_types(new_garbage_collected_types):
+    garbage_collected_types.update(new_garbage_collected_types)
+
+
 # [ImplementedAs]
 # This handles [ImplementedAs] on interface types, not [ImplementedAs] in the
 # interface being generated. e.g., given: