Remove support for [IsIndex] IDL extended attribute

Source/bindings/tests/results/V8TestEventTarget.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 13 matching lines @@
 #include "RuntimeEnabledFeatures.h"
 #include "V8EventTarget.h"
 #include "V8Node.h"
 #include "bindings/v8/ExceptionState.h"
 #include "bindings/v8/ScriptController.h"
 #include "bindings/v8/V8Binding.h"
 #include "bindings/v8/V8DOMConfiguration.h"
 #include "bindings/v8/V8DOMWrapper.h"
 #include "core/dom/ContextFeatures.h"
 #include "core/dom/Document.h"
-#include "core/dom/ExceptionCode.h"
 #include "core/page/Frame.h"
 #include "core/platform/chromium/TraceEvent.h"
 #include "wtf/GetPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/UnusedParam.h"
 
 namespace WebCore {
 
 static void initializeScriptWrappableForInterface(TestEventTarget* object)
 {
@@ skipping 21 matching lines @@
 
 template <typename T> void V8_USE(T) { }
 
 static void itemMethod(const v8::FunctionCallbackInfo<v8::Value>& args)
 {
     if (args.Length() < 1) {
         throwNotEnoughArgumentsError(args.GetIsolate());
         return;
     }
     TestEventTarget* imp = V8TestEventTarget::toNative(args.Holder());
-    ExceptionState es(args.GetIsolate());
-    V8TRYCATCH_VOID(int, index, toUInt32(args[0]));
-    if (UNLIKELY(index < 0)) {
-        setDOMException(IndexSizeError, args.GetIsolate());
-        return;
-    }
+    V8TRYCATCH_VOID(unsigned, index, toUInt32(args[0]));
     v8SetReturnValue(args, toV8(imp->item(index), args.Holder(), args.GetIsolate()));
     return;
 }
 
 static void itemMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& args)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "DOMMethod");
     TestEventTargetV8Internal::itemMethod(args);
     TRACE_EVENT_SET_SAMPLING_STATE("V8", "Execution");
 }
@@ skipping 257 matching lines @@
     installPerContextProperties(wrapper, impl.get(), isolate);
     V8DOMWrapper::associateObjectWithWrapper<V8TestEventTarget>(impl, &info, wrapper, isolate, WrapperConfiguration::Independent);
     return wrapper;
 }
 void V8TestEventTarget::derefObject(void* object)
 {
     fromInternalPointer(object)->deref();
 }
 
 } // namespace WebCore