Remove deprecated string features.

tests/compiler/dart2js_extra/string_escape_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Test that string escapes work correctly.
 
 testSingleCharacterEscapes() {
   List/*<String>*/ examples = [
     "\b\f\n\r\t\v",
     '\b\f\n\r\t\v',
     """\b\f\n\r\t\v""",
     '''\b\f\n\r\t\v''',
   ];
   List values = [8, 12, 10, 13, 9, 11];
   for (String s in examples) {
     Expect.equals(6, s.length);
     for (int i = 0; i < 6; i++) {
-      Expect.equals(values[i], s.charCodeAt(i));
+      Expect.equals(values[i], s.codeUnitAt(i));
     }
   }
 
   // An escaped quote isn't part of a multiline end quote.
   Expect.equals(r'"', """\"""");
   Expect.equals(r"'", '''\'''');
   Expect.equals(r'" "', """" \"""");
   Expect.equals(r"' '", '''' \'''');
   Expect.equals(r'"" ', """"" """);
   Expect.equals(r"'' ", ''''' ''');
@@ skipping 12 matching lines @@
       "\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f"
       "\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f"
       "\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf"
       "\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf"
       "\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf"
       "\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf"
       "\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef"
       "\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff";
   Expect.equals(256, allBytes.length);
   for (int i = 0; i < 256; i++) {
-    Expect.equals(i, allBytes.charCodeAt(i));
+    Expect.equals(i, allBytes.codeUnitAt(i));
   }
 }
 
 testUEscapes() {
   List/*String*/ examples =
     ["\u0000\u0001\u0022\u0027\u005c\u007f\u0080\u00ff"
      "\u0100\u1000\ud7ff\ue000\uffff",
      '\u0000\u0001\u0022\u0027\u005c\u007f\u0080\u00ff'
      '\u0100\u1000\ud7ff\ue000\uffff',
      """\u0000\u0001\u0022\u0027\u005c\u007f\u0080\u00ff"""
      """\u0100\u1000\ud7ff\ue000\uffff""",
      '''\u0000\u0001\u0022\u0027\u005c\u007f\u0080\u00ff'''
      '''\u0100\u1000\ud7ff\ue000\uffff'''];
   List/*<int>*/ values = [0, 1, 0x22, 0x27, 0x5c, 0x7f, 0x80, 0xff,
                           0x100, 0x1000, 0xd7ff, 0xe000, 0xffff];
   for (String s in examples) {
     Expect.equals(values.length, s.length);
     for (int i = 0; i < values.length; i++) {
-      Expect.equals(values[i], s.charCodeAt(i));
+      Expect.equals(values[i], s.codeUnitAt(i));
     }
   }
   // No characters above 0xffff until Leg supports that.
   var long =
       "\u{0}\u{00}\u{000}\u{0000}\u{00000}\u{000000}"
       "\u{1}\u{01}\u{001}\u{00001}"
       "\u{ffff}\u{0ffff}\u{00ffff}";
   var longValues = [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0xffff, 0xffff, 0xffff];
   Expect.equals(longValues.length, long.length);
   for (int i = 0; i < longValues.length; i++) {
-    Expect.equals(longValues[i], long.charCodeAt(i));
+    Expect.equals(longValues[i], long.codeUnitAt(i));
   }
 }
 
 testIdentityEscapes() {
   // All non-control ASCII characters escaped, except those with special
   // meaning: b, f, n, r, t, u, v, and x (replaced by \x00).
   var asciiLiterals =
     "\ \!\"\#\$\%\&\'\(\)\*\+\,\-\.\/\0\1\2\3\4\5\6\7\8\9\:\;\<\=\>"
     "\?\@\A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z\[\\\]"
     "\^\_\`\a\x00\c\d\e\x00\g\h\i\j\k\l\m\x00\o\p\q\x00\s\x00\x00\x00"
     "\w\x00\y\z\{\|\}\~\";
 
   Expect.equals(128 - 32, asciiLiterals.length);
   for (int i = 32; i < 128; i++) {
-    int code = asciiLiterals.charCodeAt(i - 32);
+    int code = asciiLiterals.codeUnitAt(i - 32);
     if (code != 0) {
       Expect.equals(i, code);
     }
   }
 }
 
 
 testQuotes() {
   // The string [ "' ].
   String bothQuotes = ' "' "' ";
   Expect.equals(bothQuotes, " \"' ");
   Expect.equals(bothQuotes, ' "\' ');
   Expect.equals(bothQuotes, """ "' """);
   Expect.equals(bothQuotes, ''' "' ''');
   Expect.equals(bothQuotes, r""" "' """);
   Expect.equals(bothQuotes, r''' "' ''');
 }
 
 
 testRawStrings() {
   String raw1 = r'\x00';
   Expect.equals(4, raw1.length);
-  Expect.equals(0x5c, raw1.charCodeAt(0));
+  Expect.equals(0x5c, raw1.codeUnitAt(0));
 }
 
 main() {
   // Test \x??.
   testXEscapes();
   // Test \u???? and \u{?+}.
   testUEscapes();
   // Test \b, \f, \n, \r, \t, \v.
   testSingleCharacterEscapes();
   // Test all other single character (identity) escaeps.
   testIdentityEscapes();
   // Test that quotes are handled correctly.
   testQuotes();
   // Test that raw strings are raw.
   testRawStrings();
 }