Use encoding_rs instead of uconv. r=emk,mystor.

MozReview-Commit-ID: 15Y5GTX98bv

Upstreamed from https://bugzilla.mozilla.org/show_bug.cgi?id=1261841 [ci skip]

Author: hsivonen

Diff for: encoding/iso-2022-jp-decoder.html

@@ -17,8 +17,8 @@
  }
  decode([0x1b, 0x24], "�$", "Error ESC")
  decode([0x1b, 0x24, 0x50], "�$P", "Error ESC, character")
- decode([0x1b, 0x28, 0x42, 0x50], "�P", "ASCII ESC, character")
- decode([0x1b, 0x28, 0x42, 0x1b, 0x28, 0x42, 0x50], "��P", "Double ASCII ESC, character")
+ decode([0x1b, 0x28, 0x42, 0x50], "P", "ASCII ESC, character")
+ decode([0x1b, 0x28, 0x42, 0x1b, 0x28, 0x42, 0x50], "�P", "Double ASCII ESC, character")
  decode([0x50, 0x1b, 0x28, 0x42, 0x50], "PP", "character, ASCII ESC, character")
  decode([0x5C, 0x5D, 0x7E], "\\]~", "characters")
  decode([0x0D, 0x0E, 0x0F, 0x10], "\x0D��\x10", "SO / SI")

Diff for: encoding/single-byte-decoder.html

@@ -25,7 +25,7 @@
    "ISO-8859-15":[128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,8364,165,352,167,353,169,170,171,172,173,174,175,176,177,178,179,381,181,182,183,382,185,186,187,338,339,376,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255],
    "ISO-8859-16":[128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,260,261,321,8364,8222,352,167,353,169,536,171,377,173,378,379,176,177,268,322,381,8221,182,183,382,269,537,187,338,339,376,380,192,193,194,258,196,262,198,199,200,201,202,203,204,205,206,207,272,323,210,211,212,336,214,346,368,217,218,219,220,280,538,223,224,225,226,259,228,263,230,231,232,233,234,235,236,237,238,239,273,324,242,243,244,337,246,347,369,249,250,251,252,281,539,255],
    "KOI8-R":[9472,9474,9484,9488,9492,9496,9500,9508,9516,9524,9532,9600,9604,9608,9612,9616,9617,9618,9619,8992,9632,8729,8730,8776,8804,8805,160,8993,176,178,183,247,9552,9553,9554,1105,9555,9556,9557,9558,9559,9560,9561,9562,9563,9564,9565,9566,9567,9568,9569,1025,9570,9571,9572,9573,9574,9575,9576,9577,9578,9579,9580,169,1102,1072,1073,1094,1076,1077,1092,1075,1093,1080,1081,1082,1083,1084,1085,1086,1087,1103,1088,1089,1090,1091,1078,1074,1100,1099,1079,1096,1101,1097,1095,1098,1070,1040,1041,1062,1044,1045,1060,1043,1061,1048,1049,1050,1051,1052,1053,1054,1055,1071,1056,1057,1058,1059,1046,1042,1068,1067,1047,1064,1069,1065,1063,1066],
-   "KOI8-U":[9472,9474,9484,9488,9492,9496,9500,9508,9516,9524,9532,9600,9604,9608,9612,9616,9617,9618,9619,8992,9632,8729,8730,8776,8804,8805,160,8993,176,178,183,247,9552,9553,9554,1105,1108,9556,1110,1111,9559,9560,9561,9562,9563,1169,9565,9566,9567,9568,9569,1025,1028,9571,1030,1031,9574,9575,9576,9577,9578,1168,9580,169,1102,1072,1073,1094,1076,1077,1092,1075,1093,1080,1081,1082,1083,1084,1085,1086,1087,1103,1088,1089,1090,1091,1078,1074,1100,1099,1079,1096,1101,1097,1095,1098,1070,1040,1041,1062,1044,1045,1060,1043,1061,1048,1049,1050,1051,1052,1053,1054,1055,1071,1056,1057,1058,1059,1046,1042,1068,1067,1047,1064,1069,1065,1063,1066],
+   "KOI8-U":[9472,9474,9484,9488,9492,9496,9500,9508,9516,9524,9532,9600,9604,9608,9612,9616,9617,9618,9619,8992,9632,8729,8730,8776,8804,8805,160,8993,176,178,183,247,9552,9553,9554,1105,1108,9556,1110,1111,9559,9560,9561,9562,9563,1169,1118,9566,9567,9568,9569,1025,1028,9571,1030,1031,9574,9575,9576,9577,9578,1168,1038,169,1102,1072,1073,1094,1076,1077,1092,1075,1093,1080,1081,1082,1083,1084,1085,1086,1087,1103,1088,1089,1090,1091,1078,1074,1100,1099,1079,1096,1101,1097,1095,1098,1070,1040,1041,1062,1044,1045,1060,1043,1061,1048,1049,1050,1051,1052,1053,1054,1055,1071,1056,1057,1058,1059,1046,1042,1068,1067,1047,1064,1069,1065,1063,1066],
    "macintosh":[196,197,199,201,209,214,220,225,224,226,228,227,229,231,233,232,234,235,237,236,238,239,241,243,242,244,246,245,250,249,251,252,8224,176,162,163,167,8226,182,223,174,169,8482,180,168,8800,198,216,8734,177,8804,8805,165,181,8706,8721,8719,960,8747,170,186,937,230,248,191,161,172,8730,402,8776,8710,171,187,8230,160,192,195,213,338,339,8211,8212,8220,8221,8216,8217,247,9674,255,376,8260,8364,8249,8250,64257,64258,8225,183,8218,8222,8240,194,202,193,203,200,205,206,207,204,211,212,63743,210,218,219,217,305,710,732,175,728,729,730,184,733,731,711],
    "windows-874":[8364,129,130,131,132,8230,134,135,136,137,138,139,140,141,142,143,144,8216,8217,8220,8221,8226,8211,8212,152,153,154,155,156,157,158,159,160,3585,3586,3587,3588,3589,3590,3591,3592,3593,3594,3595,3596,3597,3598,3599,3600,3601,3602,3603,3604,3605,3606,3607,3608,3609,3610,3611,3612,3613,3614,3615,3616,3617,3618,3619,3620,3621,3622,3623,3624,3625,3626,3627,3628,3629,3630,3631,3632,3633,3634,3635,3636,3637,3638,3639,3640,3641,3642,null,null,null,null,3647,3648,3649,3650,3651,3652,3653,3654,3655,3656,3657,3658,3659,3660,3661,3662,3663,3664,3665,3666,3667,3668,3669,3670,3671,3672,3673,3674,3675,null,null,null,null],
    "windows-1250":[8364,129,8218,131,8222,8230,8224,8225,136,8240,352,8249,346,356,381,377,144,8216,8217,8220,8221,8226,8211,8212,152,8482,353,8250,347,357,382,378,160,711,728,321,164,260,166,167,168,169,350,171,172,173,174,379,176,177,731,322,180,181,182,183,184,261,351,187,317,733,318,380,340,193,194,258,196,313,262,199,268,201,280,203,282,205,206,270,272,323,327,211,212,336,214,215,344,366,218,368,220,221,354,223,341,225,226,259,228,314,263,231,269,233,281,235,283,237,238,271,273,324,328,243,244,337,246,247,345,367,250,369,252,253,355,729],