DevTools: Use real focus in TreeOutline

third_party/WebKit/Source/devtools/front_end/elements/ElementsTreeElement.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 807 matching lines @@
      * @this {Elements.ElementsTreeElement}
      */
     function moveToNextAttributeIfNeeded(error) {
       if (error)
         this._editingCancelled(element, attributeName);
 
       if (!moveDirection)
         return;
 
       treeOutline.runPendingUpdates();
+      treeOutline.focus();
 
       // Search for the attribute's position, and then decide where to move to.
       var attributes = this._node.attributes();
       for (var i = 0; i < attributes.length; ++i) {
         if (attributes[i].name !== attributeName)
           continue;
 
         if (moveDirection === 'backward') {
           if (i === 0)
             this._startEditingTagName();
@@ skipping 725 matching lines @@
 
 // A union of HTML4 and HTML5-Draft elements that explicitly
 // or implicitly (for HTML5) forbid the closing tag.
 Elements.ElementsTreeElement.ForbiddenClosingTagElements = new Set([
   'area', 'base',  'basefont', 'br',   'canvas',   'col',  'command', 'embed',  'frame', 'hr',
   'img',  'input', 'keygen',   'link', 'menuitem', 'meta', 'param',   'source', 'track', 'wbr'
 ]);
 
 // These tags we do not allow editing their tag name.
 Elements.ElementsTreeElement.EditTagBlacklist = new Set(['html', 'head', 'body']);