Extensions WebUI: fix multiple error entries removed when space key is pressed

Bug: 965395
Change-Id: Ia183ca2e01733612f1228f1905450bfb980ffd6a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1627380Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Esmael El-Moslimany <aee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662936}

chrome/browser/resources/extensions/error_page.html

@@ -171,8 +171,7 @@
                   <cr-icon-button class="icon-delete-gray"
                       on-click="onDeleteErrorAction_"
                       aria-describedby$="[[item.id]]"
-                      aria-label="$i18n{clearEntry}"
-                      on-keydown="onDeleteErrorAction_"></cr-icon-button>
+                      aria-label="$i18n{clearEntry}"></cr-icon-button>
                 </div>
                 <iron-collapse opened="[[isOpened_(index, selectedEntry_)]]">
                   <div class="devtools-controls">

chrome/browser/resources/extensions/error_page.js

@@ -198,10 +198,6 @@ cr.define('extensions', function() {
      * @private
      */
     onDeleteErrorAction_: function(e) {
-      if (e.type == 'keydown' && !((e.code == 'Space' || e.code == 'Enter'))) {
-        return;
-      }
-
       this.delegate.deleteErrors(
           this.data.id, [(/** @type {!{model:Object}} */ (e)).model.item.id]);
       e.stopPropagation();