Sync the DOMParser interface with spec

Source/core/xml/DOMParser.h

 /*
  *  Copyright (C) 2003, 2006 Apple Computer, Inc.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser 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,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 10 matching lines @@
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class Document;
-class ExceptionState;
 
 class DOMParser final : public RefCountedWillBeGarbageCollected<DOMParser>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<DOMParser> create()
     {
         return adoptRefWillBeNoop(new DOMParser);
     }
 
-    PassRefPtrWillBeRawPtr<Document> parseFromString(const String&, const String& contentType, ExceptionState&);
+    PassRefPtrWillBeRawPtr<Document> parseFromString(const String&, const String& type);
 
     void trace(Visitor*) { }
 
 private:
     DOMParser() { }
 };
 
 } // namespace blink
 
 #endif // DOMParser_h