IDL: fix handling of non-decimal and unsigned default values

Source/bindings/scripts/v8_types.py

Index: Source/bindings/scripts/v8_types.py
diff --git a/Source/bindings/scripts/v8_types.py b/Source/bindings/scripts/v8_types.py
index 57b79d40e86f7ff9dc065e927e7f466b59d84ff2..d225d5b1d570cd7a6820d98558c48639db4b8462 100644
--- a/Source/bindings/scripts/v8_types.py
+++ b/Source/bindings/scripts/v8_types.py
@@ -694,3 +694,14 @@ def cpp_value_to_v8_value(idl_type, cpp_value, isolate='info.GetIsolate()', crea
     return statement
 
 IdlType.cpp_value_to_v8_value = cpp_value_to_v8_value
+
+
+def literal_cpp_value(idl_type, idl_literal):
+    """Converts an expression that is a valid C++ literal for this type."""
+    # FIXME: add validation that idl_type and idl_literal are compatible
+    literal_value = str(idl_literal)
+    if idl_type.base_type in CPP_UNSIGNED_TYPES:
+        return literal_value + 'u'
+    return literal_value
+
+IdlType.literal_cpp_value = literal_cpp_value