Remove remaining HTML elements

sky/engine/core/html/parser/HTMLInputStream.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef SKY_ENGINE_CORE_HTML_PARSER_HTMLINPUTSTREAM_H_
-#define SKY_ENGINE_CORE_HTML_PARSER_HTMLINPUTSTREAM_H_
-
-#include "sky/engine/core/html/parser/InputStreamPreprocessor.h"
-#include "sky/engine/platform/text/SegmentedString.h"
-
-namespace blink {
-
-class HTMLInputStream {
-    WTF_MAKE_NONCOPYABLE(HTMLInputStream);
-public:
-    HTMLInputStream() { }
-
-    void appendToEnd(const SegmentedString& string)
-    {
-        m_string.append(string);
-    }
-
-    void markEndOfFile()
-    {
-        m_string.append(SegmentedString(String(&kEndOfFileMarker, 1)));
-        m_string.close();
-    }
-
-    SegmentedString& current() { return m_string; }
-    const SegmentedString& current() const { return m_string; }
-
-private:
-    SegmentedString m_string;
-};
-
-}
-
-#endif  // SKY_ENGINE_CORE_HTML_PARSER_HTMLINPUTSTREAM_H_