Remove support for attribute event listeners.

client/dom/benchmarks/dromaeo/tests/dom-traverse.dart

 #library("dom-traverse.dart");
 #import("dart:dom");
 #import('../../common/common.dart');
 #import('runner.dart');
 
 
 void main() {
   final int num = 40;
 
   // Try to force real results.
   var ret;
-  window.onload = (Event evt) {
-    String html = document.body.innerHTML;
 
-    new Suite(window, 'dom-traverse')
-      .prep(() {
-        html = BenchUtil.replaceAll(html, 'id="test(\\w).*?"', (Match match) {
-          final group = match.group(1);
-          return 'id="test${group}${num}"';
-        });
-        html = BenchUtil.replaceAll(html, 'name="test.*?"', (Match match) {
-          return 'name="test${num}"';
-        });
-        html = BenchUtil.replaceAll(html, 'class="foo.*?"', (Match match) {
-          return 'class="foo test${num} bar"';
-        });
+  String html = document.body.innerHTML;
 
-        final div = document.createElement('div');
-        div.innerHTML = html;
-        document.body.appendChild(div);
-      })
-      .test('firstChild', () {
-        final nodes = document.body.childNodes;
-        final nl = nodes.length;
+  new Suite(window, 'dom-traverse')
+    .prep(() {
+      html = BenchUtil.replaceAll(html, 'id="test(\\w).*?"', (Match match) {
+        final group = match.group(1);
+        return 'id="test${group}${num}"';
+      });
+      html = BenchUtil.replaceAll(html, 'name="test.*?"', (Match match) {
+        return 'name="test${num}"';
+      });
+      html = BenchUtil.replaceAll(html, 'class="foo.*?"', (Match match) {
+        return 'class="foo test${num} bar"';
+      });
 
-        for (int i = 0; i < num; i++) {
-          for (int j = 0; j < nl; j++) {
-            Node cur = nodes[j];
-            while (cur !== null) {
-              cur = cur.firstChild;
-            }
-            ret = cur;
-          }
-        }
-      })
-      .test('lastChild', () {
-        final nodes = document.body.childNodes;
-        final nl = nodes.length;
+      final div = document.createElement('div');
+      div.innerHTML = html;
+      document.body.appendChild(div);
+    })
+    .test('firstChild', () {
+      final nodes = document.body.childNodes;
+      final nl = nodes.length;
 
-        for (int i = 0; i < num; i++) {
-          for (int j = 0; j < nl; j++) {
-            Node cur = nodes[j];
-            while (cur !== null) {
-              cur = cur.lastChild;
-            }
-            ret = cur;
-          }
-        }
-      })
-      .test('nextSibling', () {
-        for (int i = 0; i < num * 2; i++) {
-          Node cur = document.body.firstChild;
+      for (int i = 0; i < num; i++) {
+        for (int j = 0; j < nl; j++) {
+          Node cur = nodes[j];
           while (cur !== null) {
-            cur = cur.nextSibling;
+            cur = cur.firstChild;
           }
           ret = cur;
         }
-      })
-      .test('previousSibling', () {
-        for (int i = 0; i < num * 2; i++) {
-          Node cur = document.body.firstChild;
+      }
+    })
+    .test('lastChild', () {
+      final nodes = document.body.childNodes;
+      final nl = nodes.length;
+
+      for (int i = 0; i < num; i++) {
+        for (int j = 0; j < nl; j++) {
+          Node cur = nodes[j];
           while (cur !== null) {
-            cur = cur.previousSibling;
+            cur = cur.lastChild;
           }
           ret = cur;
         }
-      })
-      .test('childNodes', () {
-        for (int i = 0; i < num; i++) {
-          final nodes = document.body.childNodes;
-          for (int j = 0; j < nodes.length; j++) {
-            ret = nodes[j];
-          }
+      }
+    })
+    .test('nextSibling', () {
+      for (int i = 0; i < num * 2; i++) {
+        Node cur = document.body.firstChild;
+        while (cur !== null) {
+          cur = cur.nextSibling;
         }
-      })
-      .end();
-  };
+        ret = cur;
+      }
+    })
+    .test('previousSibling', () {
+      for (int i = 0; i < num * 2; i++) {
+        Node cur = document.body.firstChild;
+        while (cur !== null) {
+          cur = cur.previousSibling;
+        }
+        ret = cur;
+      }
+    })
+    .test('childNodes', () {
+      for (int i = 0; i < num; i++) {
+        final nodes = document.body.childNodes;
+        for (int j = 0; j < nodes.length; j++) {
+          ret = nodes[j];
+        }
+      }
+    })
+    .end();
 }