Removed IllegalAccessException and UnsupportedOperationException.

samples/ui_lib/layout/ViewLayout.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.
 
 /** The interface that the layout algorithms use to talk to the view. */
 abstract class Positionable {
   ViewLayout get layout;
 
   /** Gets our custom CSS properties, as provided by the CSS preprocessor. */
   Map<String, String> get customStyle;
@@ skipping 195 matching lines @@
       return _styleToPixels(
           style.maxHeight, currentHeight, parent.currentHeight);
     }
   }
 
   static int _toPixels(String style) {
     if (style.endsWith('px')) {
       return int.parse(style.substring(0, style.length - 2));
     } else {
       // TODO(jmesserly): other size units
-      throw new UnsupportedOperationException(
+      throw new UnsupportedError(
           'Unknown min/max content size format: "$style"');
     }
   }
 
   static int _styleToPixels(String style, num size, num parentSize) {
     if (style == 'none') {
       // For an unset max-content size, use the actual size
       return size;
     }
     if (style.endsWith('%')) {
       num percent = double.parse(style.substring(0, style.length - 1));
       return ((percent / 100) * parentSize).toInt();
     }
     return _toPixels(style);
   }
 }