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

samples/spirodraw/ColorPicker.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.
 
 part of spirodraw;
 
 typedef void PickerListener(String selectedColor);
 
 class ColorPicker {
   static const hexValues = const ['00', '33', '66', '99', 'CC', 'FF'];
@@ skipping 89 matching lines @@
   }
 
   void showSelected() {
     ctx.fillStyle = _selectedColor;
     ctx.fillRect(width / 2, 0, width / 2, 30);
     ctx.fillStyle = "white";
     ctx.fillRect(0, 0, width / 2, 30);
   }
 
   String getHexString(num value) {
-    int i = value.floor().toInt();
+    int i = value.floor();
 
     int r = (i ~/ 36) % 6;
     int g = (i % 36) ~/ 6;
     int b = i % 6;
 
     return '#${hexValues[r]}${hexValues[g]}${hexValues[b]}';
   }
 
 }