Add constants and primitive type readonly attributes to Python IDL compiler

Source/bindings/tests/results/V8TestExtendedEvent.cpp

 /*
     This file is part of the Blink open source project.
     This file has been auto-generated by CodeGeneratorV8.pm. DO NOT MODIFY!
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
@@ skipping 142 matching lines @@
 {
     desc->ReadOnlyPrototype();
 
     v8::Local<v8::Signature> defaultSignature;
     if (!RuntimeEnabledFeatures::testEnabled())
         defaultSignature = V8DOMConfiguration::installDOMClassTemplate(desc, "", V8TestEvent::GetTemplate(isolate, currentWorldType), V8TestExtendedEvent::internalFieldCount, 0, 0, 0, 0, isolate, currentWorldType);
     else
     defaultSignature = V8DOMConfiguration::installDOMClassTemplate(desc, "TestExtendedEvent", V8TestEvent::GetTemplate(isolate, currentWorldType), V8TestExtendedEvent::internalFieldCount,
         V8TestExtendedEventAttributes, WTF_ARRAY_LENGTH(V8TestExtendedEventAttributes),
         0, 0, isolate, currentWorldType);
-    UNUSED_PARAM(defaultSignature); // In some cases, it will not be used.
+    UNUSED_PARAM(defaultSignature);
     desc->SetCallHandler(V8TestExtendedEvent::constructorCallback);
     desc->SetLength(1);
 
     // Custom toString template
     desc->Set(v8::String::NewSymbol("toString"), V8PerIsolateData::current()->toStringTemplate());
     return desc;
 }
 
 v8::Handle<v8::FunctionTemplate> V8TestExtendedEvent::GetTemplate(v8::Isolate* isolate, WrapperWorldType currentWorldType)
 {
@@ skipping 43 matching lines @@
 }
 
 void V8TestExtendedEvent::derefObject(void* object)
 {
     fromInternalPointer(object)->deref();
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(TEST)