refactor(web): use encoding_rs for text encoding (#10844)

This commit removes all JS based text encoding / text decoding. Instead
encoding now happens in Rust via encoding_rs (already in tree). This
implementation retains stream support, but adds the last missing
encodings. We are incredibly close to 100% WPT on text encoding now.

This should reduce our baseline heap by quite a bit.

1 files changed, 15 insertions, 49 deletions

diff --git a/tools/wpt/expectation.json b/tools/wpt/expectation.json
index fe75af9d1..a941864e2 100644
--- a/tools/wpt/expectation.json
+++ b/tools/wpt/expectation.json
@@ -187,18 +187,6 @@
       "encodeInto() and a detached output buffer"
     ],
     "idlharness.any.html": [
-      "TextDecoder interface: existence and properties of interface object",
-      "TextDecoder interface: operation decode(optional BufferSource, optional TextDecodeOptions)",
-      "TextDecoder interface: attribute encoding",
-      "TextDecoder interface: attribute fatal",
-      "TextDecoder interface: attribute ignoreBOM",
-      "TextDecoder interface: new TextDecoder() must inherit property \"fatal\" with the proper type",
-      "TextDecoder interface: new TextDecoder() must inherit property \"ignoreBOM\" with the proper type",
-      "TextEncoder interface: existence and properties of interface object",
-      "TextEncoder interface: operation encode(optional USVString)",
-      "TextEncoder interface: operation encodeInto(USVString, Uint8Array)",
-      "TextEncoder interface: attribute encoding",
-      "TextEncoder interface: new TextEncoder() must inherit property \"encoding\" with the proper type",
       "TextDecoderStream interface: existence and properties of interface object",
       "TextDecoderStream interface object length",
       "TextDecoderStream interface object name",
@@ -216,7 +204,7 @@
       "TextEncoderStream interface: existence and properties of interface prototype object's @@unscopables property",
       "TextEncoderStream interface: attribute encoding"
     ],
-    "iso-2022-jp-decoder.any.html": false,
+    "iso-2022-jp-decoder.any.html": true,
     "legacy-mb-schinese": {
       "gb18030": {
         "gb18030-decoder.any.html": true
@@ -237,11 +225,12 @@
       "decode-utf8.any.html": false,
       "encode-bad-chunks.any.html": false,
       "encode-utf8.any.html": false,
-      "readable-writable-properties.any.html": false
+      "readable-writable-properties.any.html": false,
+      "realms.window.html": false
     },
     "textdecoder-arguments.any.html": true,
     "textdecoder-byte-order-marks.any.html": true,
-    "textdecoder-copy.any.html": false,
+    "textdecoder-copy.any.html": true,
     "textdecoder-fatal-single-byte.any.html?1-1000": true,
     "textdecoder-fatal-single-byte.any.html?1001-2000": true,
     "textdecoder-fatal-single-byte.any.html?2001-3000": true,
@@ -250,46 +239,23 @@
     "textdecoder-fatal-single-byte.any.html?5001-6000": true,
     "textdecoder-fatal-single-byte.any.html?6001-7000": true,
     "textdecoder-fatal-single-byte.any.html?7001-last": true,
-    "textdecoder-fatal-streaming.any.html": [
-      "Fatal flag, streaming cases"
-    ],
+    "textdecoder-fatal-streaming.any.html": true,
     "textdecoder-fatal.any.html": true,
     "textdecoder-ignorebom.any.html": true,
     "textdecoder-labels.any.html": [
-      "cseucpkdfmtjapanese => EUC-JP",
-      "euc-jp => EUC-JP",
-      "x-euc-jp => EUC-JP",
-      "csiso2022jp => ISO-2022-JP",
-      "iso-2022-jp => ISO-2022-JP",
-      "csshiftjis => Shift_JIS",
-      "ms932 => Shift_JIS",
-      "ms_kanji => Shift_JIS",
-      "shift-jis => Shift_JIS",
-      "shift_jis => Shift_JIS",
-      "sjis => Shift_JIS",
-      "windows-31j => Shift_JIS",
-      "x-sjis => Shift_JIS",
-      "cseuckr => EUC-KR",
-      "csksc56011987 => EUC-KR",
-      "euc-kr => EUC-KR",
-      "iso-ir-149 => EUC-KR",
-      "korean => EUC-KR",
-      "ks_c_5601-1987 => EUC-KR",
-      "ks_c_5601-1989 => EUC-KR",
-      "ksc5601 => EUC-KR",
-      "ksc_5601 => EUC-KR",
-      "windows-949 => EUC-KR",
-      "x-user-defined => x-user-defined"
+      "unicode11utf8 => UTF-8",
+      "unicode20utf8 => UTF-8",
+      "x-unicode20utf8 => UTF-8",
+      "unicodefffe => UTF-16BE",
+      "csunicode => UTF-16LE",
+      "iso-10646-ucs-2 => UTF-16LE",
+      "ucs-2 => UTF-16LE",
+      "unicode => UTF-16LE",
+      "unicodefeff => UTF-16LE"
     ],
     "textdecoder-streaming.any.html": true,
     "textdecoder-utf16-surrogates.any.html": true,
-    "textencoder-constructor-non-utf.any.html": [
-      "Encoding argument supported for decode: EUC-JP",
-      "Encoding argument supported for decode: ISO-2022-JP",
-      "Encoding argument supported for decode: Shift_JIS",
-      "Encoding argument supported for decode: EUC-KR",
-      "Encoding argument supported for decode: x-user-defined"
-    ],
+    "textencoder-constructor-non-utf.any.html": true,
     "textencoder-utf16-surrogates.any.html": true,
     "unsupported-encodings.any.html": false
   },