Move btoa() / atob() implementation out of DOMWindow

Source/core/page/DOMWindowBase64.h

 /*
- * Copyright (C) 2013 Google Inc. All rights reserved.
+ * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ * Copyright (C) 2013 Samsung Electronics. 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.
  */
 
-#ifndef ScriptString_h
-#define ScriptString_h
+#ifndef DOMWindowBase64_h
+#define DOMWindowBase64_h
 
-#include "bindings/v8/ScriptValue.h"
-#include "bindings/v8/V8Binding.h"
+#include "core/dom/ExceptionCode.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class ScriptString : public ScriptValue {
-public:
-    ScriptString() { }
-    explicit ScriptString(v8::Handle<v8::String> value) : ScriptValue(value) { }
-
-    ScriptString concatenateWith(const String&);
-    String flattenToString() const;
-};
+namespace DOMWindowBase64 {
+String btoa(void*, const String& stringToEncode, ExceptionCode&);
+String atob(void*, const String& encodedString, ExceptionCode&);
+}
 
 } // namespace WebCore
 
-#endif // ScriptString_h
+#endif // DOMWindowBase64_h