FileReader.result attribute should use IDL union types to avoid using custom binding.

Source/bindings/core/v8/custom/V8FileReaderCustom.cpp

-/*
- * Copyright (C) 2010 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "bindings/core/v8/V8FileReader.h"
-
-#include "bindings/core/v8/V8ArrayBuffer.h"
-#include "bindings/core/v8/V8Binding.h"
-#include "core/dom/ExecutionContext.h"
-
-namespace blink {
-
-void V8FileReader::resultAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
-{
-    v8::Handle<v8::Object> holder = info.Holder();
-    FileReader* impl = V8FileReader::toImpl(holder);
-    if (impl->readType() == FileReaderLoader::ReadAsArrayBuffer) {
-        v8SetReturnValueFast(info, impl->arrayBufferResult(), impl);
-        return;
-    }
-    v8SetReturnValueStringOrNull(info, impl->stringResult(), info.GetIsolate());
-}
-
-} // namespace blink