Fix support for deleting branches (if you have can_delete)

* This fixes _determineIfOwner so that the check inside it "access && !!access[repo].is_owner"
  forces a boolean value.

* This fixes a issue where you change the head to point to a different branch,
  but it did not correctly update the delete branch button, without needing
  to refresh the page.

Bug: Issue 10151
Bug: Issue 10019
Change-Id: I8a500a02865d88986b710e552b0c6d81576e301f

polygerrit-ui/app/elements/admin/gr-repo-detail-list/gr-repo-detail-list.js

@@ -62,7 +62,7 @@
       /**
        * Because  we request one more than the projectsPerPage, _shownProjects
        * maybe one less than _projects.
-       * */
+       */
       _shownItems: {
         type: Array,
         computed: 'computeShownItems(_items)',
@@ -90,7 +90,7 @@
     _determineIfOwner(repo) {
       return this.$.restAPI.getRepoAccess(repo)
           .then(access =>
-                this._isOwner = access && access[repo].is_owner);
+                this._isOwner = access && !!access[repo].is_owner);
     },
 
     _paramsChanged(params) {
@@ -194,6 +194,11 @@
         if (res.status < 400) {
           this._isEditing = false;
           e.model.set('item.revision', ref);
+          // This is needed to refresh _items property with fresh data,
+          // specifically can_delete from the json response.
+          this._getItems(
+              this._filter, this._repo, this._itemsPerPage,
+              this._offset, this.detailType);
         }
       });
     },
@@ -240,10 +245,11 @@
       this.$.overlay.open();
     },
 
-    _computeHideDeleteClass(owner, deleteRef) {
+    _computeHideDeleteClass(owner, canDelete) {
-      if (owner && !deleteRef || owner && deleteRef || deleteRef || owner) {
+      if (canDelete || owner) {
         return 'show';
       }
+
       return '';
     },
 

polygerrit-ui/app/elements/admin/gr-repo-detail-list/gr-repo-detail-list_test.html

@@ -549,5 +549,11 @@ limitations under the License.
         element._paramsChanged(params);
       });
     });
+
+    test('test _computeHideDeleteClass', () => {
+      assert.deepEqual(element._computeHideDeleteClass(true, false), 'show');
+      assert.deepEqual(element._computeHideDeleteClass(false, true), 'show');
+      assert.deepEqual(element._computeHideDeleteClass(false, false), '');
+    });
   });
 </script>