Make ~/, round, ceil, floor, truncate return ints. Remove toInt.

samples/swarm/Decoder.dart

 // Copyright (c) 2011, 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 swarmlib;
 
 // TODO(jimhug): Fill out methods, add encoder, move to shared lib.
 class Decoder {
   int index;
   String data;
 
   Decoder(this.data) {
     this.index = 0;
   }
 
   // Reads numbers in variable-length 7-bit encoding.  This matches the
   // varint encoding used by protobufs except that it only uses 7
   // bits per byte so it can be efficiently passed as UTF8.
   // For more info, see appengine/encoder.py.
   int readInt() {
     var r = 0;
     for (var i=0; ; i++) {
       var v = data.charCodeAt(index++);
       r |= (v & 0x3F) << (6 * i);
       if ((v & 0x40) == 0) break;
     }
-    return r.toInt();
+    return r.truncate();
   }
 
   bool readBool() {
     final ch = data[index++];
     assert (ch == 'T' || ch == 'F');
     return ch == 'T';
   }
 
   String readString() {
     int len = readInt();
     String s = data.substring(index, index+len);
     index += len;
     return s;
   }
 }