IDL: Avoid generating empty ConstantConfiguration arrays

Source/bindings/tests/results/V8TestInterface2.cpp

Index: Source/bindings/tests/results/V8TestInterface2.cpp
diff --git a/Source/bindings/tests/results/V8TestInterface2.cpp b/Source/bindings/tests/results/V8TestInterface2.cpp
index 1031013c3289e4d567637d756d47163e265df472..b854ec5ba642dc09adc1346d28180c0f4a6d6c68 100644
--- a/Source/bindings/tests/results/V8TestInterface2.cpp
+++ b/Source/bindings/tests/results/V8TestInterface2.cpp
@@ -485,6 +485,11 @@ static void installV8TestInterface2Template(v8::Handle<v8::FunctionTemplate> fun
     functionTemplate->SetLength(0);
     v8::Local<v8::ObjectTemplate> instanceTemplate ALLOW_UNUSED = functionTemplate->InstanceTemplate();
     v8::Local<v8::ObjectTemplate> prototypeTemplate ALLOW_UNUSED = functionTemplate->PrototypeTemplate();
+    if (RuntimeEnabledFeatures::featureNameEnabled()) {
+        static const V8DOMConfiguration::ConstantConfiguration constantConfiguration = {"CONST_VALUE_1", 1, 0, 0, V8DOMConfiguration::ConstantTypeUnsignedShort};
+        V8DOMConfiguration::installConstants(functionTemplate, prototypeTemplate, &constantConfiguration, 1, isolate);
+    }
+    COMPILE_ASSERT(1 == TestInterface2::CONST_VALUE_1, TheValueOfTestInterface2_CONST_VALUE_1DoesntMatchWithImplementation);
     functionTemplate->InstanceTemplate()->SetIndexedPropertyHandler(TestInterface2V8Internal::indexedPropertyGetterCallback, TestInterface2V8Internal::indexedPropertySetterCallback, 0, TestInterface2V8Internal::indexedPropertyDeleterCallback, indexedPropertyEnumerator<TestInterface2>);
     functionTemplate->InstanceTemplate()->SetNamedPropertyHandler(TestInterface2V8Internal::namedPropertyGetterCallback, TestInterface2V8Internal::namedPropertySetterCallback, TestInterface2V8Internal::namedPropertyQueryCallback, TestInterface2V8Internal::namedPropertyDeleterCallback, TestInterface2V8Internal::namedPropertyEnumeratorCallback);