message: Add optional maximum deflate ratio to MslSetup.js.
diff: */
  getCompressionImpls: function() {},
  + /**
  + * <p>Provides the maximum deflate ratio.</p>
  + *
  + * <p><b>optional</b>: default maximum deflate ratio will be used</p>
  + *
  + * @return {?number} the maximum deflate ratio.
  + */
  + getMaxDeflateRatio: function() {},
  +
  /**
  * <p>Provides the TextEncoding implementation.</p>
  *
  MslCompression.register(algo, impl);
  }
  }
  + var maxDeflateRatio = setup.getMaxDeflateRatio();
  + if (maxDeflateRatio)
  + MslCompression.setMaxDeflateRatio(maxDeflateRatio);
  // Text encoding.
  var textEncodingImpl = setup.getTextEncodingImpl();
  