Split Dictionary's get and convert into DictionaryHelper.

Source/modules/encoding/TextEncoder.cpp

 /*
  * Copyright (C) 2013 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
@@ skipping 58 matching lines @@
 String TextEncoder::encoding() const
 {
     String name = String(m_encoding.name()).lower();
     ASSERT(name == "utf-8" || name == "utf-16le" || name == "utf-16be");
     return name;
 }
 
 PassRefPtr<Uint8Array> TextEncoder::encode(const String& input, const Dictionary& options)
 {
     bool stream = false;
-    options.get("stream", stream);
+    DictionaryHelper::get(options, "stream", stream);
 
     // FIXME: Not flushing is not supported by TextCodec for encode; add it or
     // handle split surrogates here.
 
     CString result;
     if (input.is8Bit())
         result = m_codec->encode(input.characters8(), input.length(), WTF::QuestionMarksForUnencodables);
     else
         result = m_codec->encode(input.characters16(), input.length(), WTF::QuestionMarksForUnencodables);
 
     const char* buffer = result.data();
     const unsigned char* unsignedBuffer = reinterpret_cast<const unsigned char*>(buffer);
 
     return Uint8Array::create(unsignedBuffer, result.length());
 }
 
 } // namespace WebCore