DevTools: show alternate title onexpand of object in console

third_party/WebKit/Source/devtools/front_end/console/ConsoleViewMessage.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * 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 418 matching lines @@
      * @param {!WebInspector.RemoteObject} obj
      * @param {!Element} titleElement
      * @return {!WebInspector.ObjectPropertiesSection}
      */
     _buildExpandableObjectSection: function(obj, titleElement)
     {
         var note = titleElement.createChild("span", "object-state-note");
         note.classList.add("info-note");
         note.title = WebInspector.UIString("Object value at left was snapshotted when logged, value below was evaluated just now.");
 
-        var section = new WebInspector.ObjectPropertiesSection(obj, titleElement, this._linkifier);
+        var titleText = titleElement.deepTextContent();
+        var expandedTitleElement = null;
+        if (obj.description !== titleText && WebInspector.ObjectPropertiesSection.needsAlternateTitle(obj)) {
+            expandedTitleElement = createElement("span");
+            expandedTitleElement.createTextChild(obj.description || "");

[lushnikov, 2016/07/12 02:51:55]

let's just create a TextNode with obj.description || "" and pass it down to
ObjectPropertiesSection

[luoe, 2016/07/13 18:06:28]

One reason to keep expandedTitleElement an HTMLElement is that we can add the
snapshot-info-note on #435 as a child of the expandedTitleElement.  Then on
expand/collapse, the expandedTitleElement's children can be swapped in and out.

+        }
+
+        var section = new WebInspector.ObjectPropertiesSection(obj, titleElement, expandedTitleElement, this._linkifier);
         section.element.classList.add("console-view-object-properties-section");
         section.enableContextMenu();
         return section;
     },
 
     /**
      * @param {!WebInspector.RemoteObject} func
      * @param {!Element} element
      * @param {boolean=} includePreview
      */
@@ skipping 901 matching lines @@
     {
         if (!this._wrapperElement) {
             WebInspector.ConsoleViewMessage.prototype.toMessageElement.call(this);
             this._wrapperElement.classList.toggle("collapsed", this._collapsed);
         }
         return this._wrapperElement;
     },
 
     __proto__: WebInspector.ConsoleViewMessage.prototype
 }