Dart SDK Spelling b, c, and d.

samples-dev/swarm/swarm_ui_lib/layout/GridLayout.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 layout;
 
 /**
  * Implements a grid-based layout system based on:
  * [http://dev.w3.org/csswg/css3-grid-align/]
  *
  * This layout is designed to support animations and work on browsers that
  * don't support grid natively. As such, we implement it on top of absolute
  * positioning.
  */
 // TODO(jmesserly): the DOM integration still needs work:
 //  - The grid assumes it is absolutely positioned in its container.
-//    Becasue of that, the grid doesn't work right unless it has at least one
+//    Because of that, the grid doesn't work right unless it has at least one
 //    fractional size in each dimension. In other words, only "top down" grids
 //    work at the moment, because the grid can't determine its own size.
 //    The core algorithm supports computing min breadth; the issue is about how
 //    to integrate it into our View layer.
 //  - Unless a child element is "display: inline-block" we can't get its
 //    horizontal content size.
 //  - Once we set an element's size to "position: absolute", we lose the
 //    ability to get its original content size. If the width or height gets
 //    set to something other than the content size, we can't recover the
 //    original content size.
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     return result;
   }
 
   int _getSpanCount(ViewLayout item) {
     GridLayoutParams childLayout = item.layoutParams;
     return (_dimension == Dimension.WIDTH
         ? childLayout.columnSpan
         : childLayout.rowSpan);
   }
 }