Remove support for attribute event listeners.

client/samples/spirodraw/Spirodraw.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.
 
 #library('spirodraw');
 
 #import('dart:dom');
 #source("ColorPicker.dart");
 #resource("spirodraw.css");
 
@@ skipping 38 matching lines @@
     penRadiusSlider = doc.getElementById("pen_radius");
     penWidthSlider = doc.getElementById("pen_width");
     speedSlider = doc.getElementById("speed");
     numTurns = doc.getElementById("num_turns");
     mainDiv = doc.getElementById("main");
     frontCanvas = doc.getElementById("canvas");
     front = frontCanvas.getContext("2d");
     backCanvas = doc.createElement("canvas");
     back = backCanvas.getContext("2d");
     paletteElement = doc.getElementById("palette");
-    window.onresize = (EventListener) { onResize(); };
+    window.addEventListener('resize', (Event) => onResize(), true);
     initControlPanel();
   }
 
   void go() {
     onResize();
   }
   
   void onResize() {
     height = window.innerHeight;
     width = window.innerWidth - 270;
     yc = height~/2;
     xc = width~/2;
     frontCanvas.height = height;
     frontCanvas.width = width;
     backCanvas.height = height;
     backCanvas.width = width;
     clear();
   }
   
   void initControlPanel() {
-    inOrOut.onchange = (EventListener) { refresh(); };
-    fixedRadiusSlider.onchange = (EventListener) { refresh(); };
-    wheelRadiusSlider.onchange = (EventListener) { refresh(); };
-    speedSlider.onchange = (EventListener) { onSpeedChange(); };
-    penRadiusSlider.onchange = (EventListener) { refresh(); };
-    penWidthSlider.onchange = (EventListener) { onPenWidthChange(); };
+    inOrOut.addEventListener('change', (Event) => refresh(), true);
+    fixedRadiusSlider.addEventListener('change', (Event) => refresh(), true);
+    wheelRadiusSlider.addEventListener('change', (Event) => refresh(), true);
+    speedSlider.addEventListener('change', (Event) => onSpeedChange(), true);
+    penRadiusSlider.addEventListener('change', (Event) => refresh(), true);
+    penWidthSlider.addEventListener('change', (Event) => onPenWidthChange(), true);
     colorPicker = new ColorPicker(paletteElement);
-    colorPicker.addListener((String color) { onColorChange(color); });
-    doc.getElementById("start").onclick = (EventListener) { start(); };
-    doc.getElementById("stop").onclick = (EventListener) { stop(); };
-    doc.getElementById("clear").onclick = (EventListener) { clear(); };
-    doc.getElementById("lucky").onclick = (EventListener) { lucky(); };
+    colorPicker.addListener((String color) => onColorChange(color));
+    doc.getElementById("start").addEventListener('click', (EventListener) => start(), true);
+    doc.getElementById("stop").addEventListener('click', (EventListener) => stop(), true);
+    doc.getElementById("clear").addEventListener('click', (EventListener) => clear(), true);
+    doc.getElementById("lucky").addEventListener('click', (EventListener) => lucky(), true);
   }
   
   void onColorChange(String color) {
     penColor = color;
     drawFrame(rad);
   }
 
   void onSpeedChange() {
     speed = speedSlider.valueAsNumber;
     stepSize = calcStepSize();
@@ skipping 198 matching lines @@
 
 int gcf(int n, int d) {
   if (n==d)
     return n;
   int max = Math.max(n, d);
   for (int i = max ~/ 2; i > 1; i--)
     if ((n % i == 0) && (d % i == 0))
       return i;
   return 1;
 }