[bindings] Compact ConstantConfiguration by using |union|

Source/bindings/tests/results/core/V8TestInterface2.cpp

Index: Source/bindings/tests/results/core/V8TestInterface2.cpp
diff --git a/Source/bindings/tests/results/core/V8TestInterface2.cpp b/Source/bindings/tests/results/core/V8TestInterface2.cpp
index 995b6197e313161508c84d86fe840dbdcf36bc73..61a50f2dd71dd9f502e297ec9955c3d0bf778830 100644
--- a/Source/bindings/tests/results/core/V8TestInterface2.cpp
+++ b/Source/bindings/tests/results/core/V8TestInterface2.cpp
@@ -655,7 +655,7 @@ static void installV8TestInterface2Template(v8::Local<v8::FunctionTemplate> func
     v8::Local<v8::ObjectTemplate> prototypeTemplate = functionTemplate->PrototypeTemplate();
     ALLOW_UNUSED_LOCAL(prototypeTemplate);
     if (RuntimeEnabledFeatures::featureNameEnabled()) {
-        static const V8DOMConfiguration::ConstantConfiguration constantConfiguration = {"CONST_VALUE_1", 1, 0, 0, V8DOMConfiguration::ConstantTypeUnsignedShort};
+        static const V8DOMConfiguration::ConstantConfiguration constantConfiguration = {"CONST_VALUE_1", 1, V8DOMConfiguration::ConstantTypeUnsignedShort};
         V8DOMConfiguration::installConstant(isolate, functionTemplate, prototypeTemplate, constantConfiguration);
     }
     static_assert(1 == TestInterface2::CONST_VALUE_1, "the value of TestInterface2_CONST_VALUE_1 does not match with implementation");