Remove deprecated string features.

sdk/lib/uri/encode_decode.dart

 // Copyright (c) 2013, 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.
 
 part of dart.uri;
 
 /**
  * Javascript-like URI encode/decode functions.
  * The documentation here borrows heavily from the original Javascript
  * doumentation on MDN at:
@@ skipping 96 matching lines @@
 /**
  * This is the internal implementation of JavaScript's encodeURI function.
  * It encodes all characters in the string [text] except for those
  * that appear in [canonicalTable], and returns the escaped string.
  */
 String _uriEncode(List<int> canonicalTable, String text) {
   final String hex = '0123456789ABCDEF';
   var byteToHex = (int v) => '%${hex[v >> 4]}${hex[v & 0x0f]}';
   StringBuffer result = new StringBuffer();
   for (int i = 0; i < text.length; i++) {
-    int ch = text.charCodeAt(i);
+    int ch = text.codeUnitAt(i);
     if (ch < 128 && ((canonicalTable[ch >> 4] & (1 << (ch & 0x0f))) != 0)) {
       result.add(text[i]);
     } else if (text[i] == " ") {
       result.add("+");
     } else {
       if (ch >= 0xD800 && ch < 0xDC00) {
         // Low surrogate. We expect a next char high surrogate.
         ++i;
-        int nextCh = text.length == i ? 0 : text.charCodeAt(i);
+        int nextCh = text.length == i ? 0 : text.codeUnitAt(i);
         if (nextCh >= 0xDC00 && nextCh < 0xE000) {
           // convert the pair to a U+10000 codepoint
-          ch = 0x10000 + ((ch-0xD800) << 10) + (nextCh - 0xDC00);
+          ch = 0x10000 + ((ch - 0xD800) << 10) + (nextCh - 0xDC00);
         } else {
           throw new ArgumentError('Malformed URI');
         }
       }
       for (int codepoint in codepointsToUtf8([ch])) {
         result.add(byteToHex(codepoint));
       }
     }
   }
   return result.toString();
 }
 
 /**
  * Convert a byte (2 character hex sequence) in string [s] starting
  * at position [pos] to its ordinal value
  */
-
 int _hexCharPairToByte(String s, int pos) {
   int byte = 0;
   for (int i = 0; i < 2; i++) {
-    var charCode = s.charCodeAt(pos + i);
+    var charCode = s.codeUnitAt(pos + i);
     if (0x30 <= charCode && charCode <= 0x39) {
       byte = byte * 16 + charCode - 0x30;
     } else {
       // Check ranges A-F (0x41-0x46) and a-f (0x61-0x66).
       charCode |= 0x20;
       if (0x61 <= charCode && charCode <= 0x66) {
         byte = byte * 16 + charCode - 0x57;
       } else {
         throw new ArgumentError("Invalid URL encoding");
       }
@@ skipping 29 matching lines @@
         if (i == text.length)
           break;
         ch = text[i];
       }
       result.add(decodeUtf8(codepoints));
     }
   }
   return result.toString();
 }