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

Source/modules/encoding/TextDecoder.cpp

Index: Source/modules/encoding/TextDecoder.cpp
diff --git a/Source/modules/encoding/TextDecoder.cpp b/Source/modules/encoding/TextDecoder.cpp
index 69d37d050a4bf4165db0af3150655c7f24844327..c1fad08a059c574dfb6a33ebf8b233e6d057f290 100644
--- a/Source/modules/encoding/TextDecoder.cpp
+++ b/Source/modules/encoding/TextDecoder.cpp
@@ -68,7 +68,12 @@ 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)