MD Bookmarks: Focus sidebar nodes on click without showing an outline

chrome/browser/resources/md_bookmarks/folder_node.js

Index: chrome/browser/resources/md_bookmarks/folder_node.js
diff --git a/chrome/browser/resources/md_bookmarks/folder_node.js b/chrome/browser/resources/md_bookmarks/folder_node.js
index f5b101e8f34eb7744d0aa13f13ad4cfef6e962be..4c264a2c4ae1659e4f97a415387b64b62f96979f 100644
--- a/chrome/browser/resources/md_bookmarks/folder_node.js
+++ b/chrome/browser/resources/md_bookmarks/folder_node.js
@@ -6,6 +6,7 @@ Polymer({
   is: 'bookmarks-folder-node',
 
   behaviors: [
+    bookmarks.MouseFocusBehavior,
     bookmarks.StoreClient,
   ],
 
@@ -69,7 +70,10 @@ Polymer({
     }
   },
 
-  /** @return {HTMLElement} */
+  /**
+   * @return {!HTMLElement}
+   * @private

[calamity, 2017/06/08 05:07:11]

lol. @private != @override

[tsergeant, 2017/06/08 05:16:30]

Oh geez, my brain is running on autopilot a little bit. This is one of the cases
where override doesn't work because a behavior is not actual inheritance, but
I've added a comment for it.

+   */
   getFocusTarget: function() {
     return this.$.container;
   },
@@ -344,6 +348,6 @@ Polymer({
    * @return {string}
    */
   getTabIndex_: function() {
-    return this.isSelectedFolder_ ? '0' : '';
+    return this.isSelectedFolder_ ? '0' : '-1';
   },
 });