Encoding API: Use 'windows-1252' as name for 'us-ascii' 'iso-8859-1'

Source/modules/encoding/TextDecoder.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 50 matching lines @@
     , m_fatal(fatal)
 {
 }
 
 TextDecoder::~TextDecoder()
 {
 }
 
 String TextDecoder::encoding() const
 {
-    return String(m_encoding.name()).lower();
+    String name = String(m_encoding.name()).lower();
+    // Where possible, encoding aliases should be handled by changes to Chromium's ICU or Blink's WTF.
+    // The same codec is used, but WTF maintains a different name/identity for these.
+    if (name == "iso-8859-1" || name == "us-ascii")
+        return "windows-1252";
+    return name;
 }
 
 String TextDecoder::decode(ArrayBufferView* input, const Dictionary& options, ExceptionState& es)
 {
     bool stream = false;
     options.get("stream", stream);
 
     const char* start = input ? static_cast<const char*>(input->baseAddress()) : 0;
     size_t length = input ? input->byteLength() : 0;
 
     bool flush = !stream;
 
     // FIXME: Not all TextCodec implementations handle |flush| - notably TextCodecUTF16
     // ignores it and never flushes!
 
     bool sawError = false;
     String s = m_codec->decode(start, length, flush, m_fatal, sawError);
 
     if (m_fatal && sawError) {
         es.throwDOMException(EncodingError, "The encoded data was not valid.");
         return String();
     }
 
     return s;
 }
 
 } // namespace WebCore