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

samples/swarm/swarm_ui_lib/touch/Scroller.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 touch;
 
 /**
  * Implementation of a custom scrolling behavior.
  * This behavior overrides native scrolling for an area. This area can be a
  * single defined part of a page, the entire page, or several different parts
@@ skipping 333 matching lines @@
                 decelerationFactor),
             decelerationFactor);
         onDecelStart.dispatch(new Event(ScrollerEventType.DECEL_START));
       }
     });
   }
 
   void throwDelta(num deltaX, num deltaY, [num decelerationFactor = null]) {
     Coordinate start = _contentOffset;
     Coordinate end = currentTarget;
-    int x = end.x.toInt();
-    int y = end.y.toInt();
+    int x = end.x.truncate();
+    int y = end.y.truncate();
     // If we are throwing in the opposite direction of the existing momentum,
     // cancel the current momentum.
     if (deltaX != 0 && deltaX.isNegative != (end.x - start.x).isNegative) {
       x = start.x;
     }
     if (deltaY != 0 && deltaY.isNegative != (end.y - start.y).isNegative) {
       y = start.y;
     }
-    x += deltaX.toInt();
-    y += deltaY.toInt();
+    x += deltaX.truncate();
+    y += deltaY.truncate();
     throwTo(x, y, decelerationFactor);
   }
 
   void setPosition(num x, num y) {
     _momentum.abort();
     _contentOffset.x = x;
     _contentOffset.y = y;
     _snapContentOffsetToBounds();
     _setContentOffset(_contentOffset.x, _contentOffset.y);
   }
@@ skipping 339 matching lines @@
     for (EventListener listener in _listeners) {
       listener(evt);
     }
   }
 }
 
 class ScrollerScrollTechnique {
   static const TRANSFORM_3D = 1;
   static const RELATIVE_POSITIONING = 2;
 }