WebUI: Fix middle click link issue in click handler

chrome/browser/resources/shared/js/util.js

Index: chrome/browser/resources/shared/js/util.js
diff --git a/chrome/browser/resources/shared/js/util.js b/chrome/browser/resources/shared/js/util.js
index 63b3a8c3e36d2420c9c4ec5088dd5e5079d7f18a..ff75b0c527617a3e6bda845e60142d3b49dbb2a7 100644
--- a/chrome/browser/resources/shared/js/util.js
+++ b/chrome/browser/resources/shared/js/util.js
@@ -108,12 +108,9 @@ function swapDomNodes(a, b) {
   aParent.insertBefore(b, afterA);
 }
 
-/*
- * Handles a click or mouseup on a link. If the link points to a chrome: or
- * file: url, then call into the browser to do the navigation.
- * @return {Object} e The click or mouseup event.
- */
-function handleLinkClickOrMouseUp(e) {
+// Handle click on a link. If the link points to a chrome: or file: url, then
+// call into the browser to do the navigation.
+document.addEventListener('click', function(e) {
   // Allow preventDefault to work.
   if (!e.returnValue)
     return;
@@ -126,14 +123,10 @@ function handleLinkClickOrMouseUp(e) {
     }
 
     if ((el.protocol == 'file:' || el.protocol == 'about:') &&
-        ((e.button == 0 && e.type == 'click') ||
-        (e.button == 1 && e.type == 'mouseup'))) {
+        (e.button == 0 || e.button == 1)) {
       chrome.send('navigateToUrl',
           [el.href, e.button, e.altKey, e.ctrlKey, e.metaKey, e.shiftKey]);
       e.preventDefault();
     }
   }
-}
-
-document.addEventListener('click', handleLinkClickOrMouseUp);
-document.addEventListener('mouseup', handleLinkClickOrMouseUp);
+});