bindings: Don't wrap nullable callback functions in Nullable<T>

third_party/WebKit/Source/bindings/scripts/v8_types.py

Index: third_party/WebKit/Source/bindings/scripts/v8_types.py
diff --git a/third_party/WebKit/Source/bindings/scripts/v8_types.py b/third_party/WebKit/Source/bindings/scripts/v8_types.py
index f9a85c73a3306e464dcc44b7cb8ae3b98f5e1d8d..ec7af0a77932b25708de186b51475696705c99ab 100644
--- a/third_party/WebKit/Source/bindings/scripts/v8_types.py
+++ b/third_party/WebKit/Source/bindings/scripts/v8_types.py
@@ -965,10 +965,14 @@ def cpp_type_has_null_value(idl_type):
     #   a null pointer.
     # - Union types, as thier container classes can represent null value.
     # - 'Object' and 'any' type. We use ScriptValue for object type.
-    return (idl_type.is_string_type or idl_type.is_interface_type or
-            idl_type.is_enum or idl_type.is_union_type
-            or idl_type.base_type == 'object' or idl_type.base_type == 'any'
-            or idl_type.is_custom_callback_function or idl_type.is_callback_interface)
+    return (idl_type.is_string_type
+            or idl_type.is_enum
+            or idl_type.is_interface_type
+            or idl_type.is_callback_interface
+            or idl_type.is_callback_function
+            or idl_type.is_custom_callback_function
+            or idl_type.is_union_type
+            or idl_type.base_type == 'object' or idl_type.base_type == 'any')
 
 IdlTypeBase.cpp_type_has_null_value = property(cpp_type_has_null_value)