DevTools: update DOM children when the only text child is modified.

Source/devtools/front_end/elements/ElementsTreeOutline.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 1181 matching lines @@
         this._updateModifiedNodesSoon();
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _characterDataModified: function(event)
     {
         var node = /** @type {!WebInspector.DOMNode} */ (event.data);
         this._addUpdateRecord(node).charDataModified();
+        // Text could be large and force us to render itself as the child in the tree outline.
+        if (node.parentNode && node.parentNode.firstChild === node.parentNode.lastChild)
+            this._addUpdateRecord(node.parentNode).childrenModified();
         this._updateModifiedNodesSoon();
     },
 
     /**
      * @param {!WebInspector.Event} event
      */
     _nodeInserted: function(event)
     {
         var node = /** @type {!WebInspector.DOMNode} */ (event.data);
         this._addUpdateRecord(/** @type {!WebInspector.DOMNode} */ (node.parentNode)).nodeInserted(node);
@@ skipping 167 matching lines @@
 
         return visibleChildren;
     },
 
     /**
      * @param {!WebInspector.DOMNode} node
      * @return {boolean}
      */
     _hasVisibleChildren: function(node)
     {
-        if (WebInspector.ElementsTreeElement.canShowInlineText(node))
-            return false;
-
         if (node.importedDocument())
             return true;
         if (node.templateContent())
             return true;
-        if (node.childNodeCount())
-            return true;
         if (WebInspector.ElementsTreeElement.visibleShadowRoots(node).length)
             return true;
         if (node.hasPseudoElements())
             return true;
         if (node.isInsertionPoint())
             return true;
-        return false;
+        return !!node.childNodeCount() && !WebInspector.ElementsTreeElement.canShowInlineText(node);
     },
 
     /**
      * @param {!WebInspector.ElementsTreeElement} treeElement
      */
     _createExpandAllButtonTreeElement: function(treeElement)
     {
         var button = createTextButton("", handleLoadAllChildren.bind(this));
         button.value = "";
         var expandAllButtonElement = new TreeElement(button);
@@ skipping 409 matching lines @@
             if (node) {
                 this.treeOutline._selectedDOMNode = node;
                 this.treeOutline._selectedNodeChanged();
             }
         }
         return true;
     },
 
     __proto__: TreeElement.prototype
 }