Remove I411 support, update doc and switch to side by side test

include/libyuv/mjpeg_decoder.h

 /*
  *  Copyright 2012 The LibYuv Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS. All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 19 matching lines @@
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 static const uint32 kUnknownDataSize = 0xFFFFFFFF;
 
 enum JpegSubsamplingType {
   kJpegYuv420,
   kJpegYuv422,
-  kJpegYuv411,
   kJpegYuv444,
   kJpegYuv400,
   kJpegUnknown
 };
 
 struct Buffer {
   const uint8* data;
   int len;
 };
 
@@ skipping 132 matching lines @@
   // Temporary buffer used for decoding when we can't decode directly to the
   // output buffers. Large enough for just one iMCU row.
   uint8** databuf_;
   int* databuf_strides_;
 };
 
 }  // namespace libyuv
 
 #endif  //  __cplusplus
 #endif  // INCLUDE_LIBYUV_MJPEG_DECODER_H_