Remove deprecated string features.

runtime/vm/snapshot_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.
 
 import 'dart:isolate';
 import 'dart:async';
 
 class Fields {
   Fields(int i, int j) : fld1 = i, fld2 = j, fld5 = true {}
   int fld1;
@@ skipping 86 matching lines @@
 class TowersDisk {
   final int size;
   TowersDisk next;
 
   TowersDisk(size) : this.size = size, next = null {}
 }
 
 class Towers {
   List<TowersDisk> piles;
   int movesDone;
-  Towers(int disks) 
+  Towers(int disks)
       : piles = new List<TowersDisk>.fixedLength(3), movesDone = 0 {
     build(0, disks);
   }
 
   void build(int pile, int disks) {
     for (var i = disks - 1; i >= 0; i--) {
       push(pile, new TowersDisk(i));
     }
   }
 
@@ skipping 704 matching lines @@
     var result;
     var text = getRandomString(ITERATE1);
 
     ConcatStringBenchmark.test(ITERATE2);
     ConcatStringFromCharCodeBenchmark.test(ITERATE2);
     StringSplitBenchmark.test(text);
     StringSplitOnCharBenchmark.test(text);
     text += text;
     CharAtBenchmark.test(text, ITERATE3);
     NumberBenchmark.test(text, ITERATE3);
-    CharCodeAtBenchmark.test(text, ITERATE3);
+    CodeUnitAtBenchmark.test(text, ITERATE3);
     IndexOfBenchmark.test(text, ITERATE3);
     LastIndexOfBenchmark.test(text, ITERATE3);
     SliceBenchmark.test(text, ITERATE4);
     SubstrBenchmark.test(text, ITERATE4);
     SubstringBenchmark.test(text, ITERATE4);
     ToLowerCaseBenchmark.test(text, ITERATE5);
     ToUpperCaseBenchmark.test(text, ITERATE5);
     ComparingBenchmark.test(text, ITERATE5);
   }
 }
@@ skipping 68 matching lines @@
       str = input[input.length - 1];
       str = input[150]; //set it to 15000
       str = input[100]; //set it to 10000
       str = input[50]; //set it to 5000
     }
     return str;
   }
 }
 
 
-class CharCodeAtBenchmark {
-  CharCodeAtBenchmark() {}
+class CodeUnitAtBenchmark {
+  CodeUnitAtBenchmark() {}
 
   static String test(String input, var iterations) {
     var str;
     for (var j = 0; j < iterations; j++) {
-      str = input.charCodeAt(0);
-      str = input.charCodeAt(input.length - 1);
-      str = input.charCodeAt(150); //set it to 15000
-      str = input.charCodeAt(100); //set it to 10000
-      str = input.charCodeAt(50); //set it to 5000
+      str = input.codeUnitAt(0);
+      str = input.codeUnitAt(input.length - 1);
+      str = input.codeUnitAt(150); //set it to 15000
+      str = input.codeUnitAt(100); //set it to 10000
+      str = input.codeUnitAt(50); //set it to 5000
     }
     return str;
   }
 }
 
 class IndexOfBenchmark {
   IndexOfBenchmark() {}
 
   static String test(String input, var iterations) {
     var str;
@@ skipping 608 matching lines @@
 void processLines() {
   port.receive((message, SendPort replyTo) {
     if (message == TERMINATION_MESSAGE) {
       assert(replyTo == null);
       port.close();
     } else {
       replyTo.send(processLine(message), null);
     }
   });
 }