MD Downloads: fix double click bug

chrome/browser/resources/md_downloads/crisper.js

Index: chrome/browser/resources/md_downloads/crisper.js
diff --git a/chrome/browser/resources/md_downloads/crisper.js b/chrome/browser/resources/md_downloads/crisper.js
index 4c03152402268766a3358ea7da910c3ff36dd979..9ff07deae87c16151f4ad3c13d97404a42d4fa20 100644
--- a/chrome/browser/resources/md_downloads/crisper.js
+++ b/chrome/browser/resources/md_downloads/crisper.js
@@ -1760,7 +1760,7 @@ var ActionLink = document.registerElement('action-link', {
         this.setAttribute('role', 'link');
 
       this.addEventListener('keydown', function(e) {
-        if (!this.disabled && e.keyIdentifier == 'Enter') {
+        if (!this.disabled && e.keyIdentifier == 'Enter' && !this.href) {
           // Schedule a click asynchronously because other 'keydown' handlers
           // may still run later (e.g. document.addEventListener('keydown')).
           // Specifically options dialogs break when this timeout isn't here.