DevTools: [Elements] Fix updates of the DOM tree upon inline text node removal

Source/devtools/front_end/ui/treeoutline.js

Index: Source/devtools/front_end/ui/treeoutline.js
diff --git a/Source/devtools/front_end/ui/treeoutline.js b/Source/devtools/front_end/ui/treeoutline.js
index 55ec4c50c6a46714e558f75087ecd5ce2f73a2a1..7bbea86ec05debc1966dac6beae1b5ebbcea1557 100644
--- a/Source/devtools/front_end/ui/treeoutline.js
+++ b/Source/devtools/front_end/ui/treeoutline.js
@@ -518,6 +518,16 @@ TreeElement.prototype = {
         return this._hasChildren;
     },
 
+    /**
+     * Used inside subclasses.
+     *
+     * @param {boolean} hasChildren
+     */
+    setHasChildren: function(hasChildren)
+    {
+        this.hasChildren = hasChildren;
+    },
+
     set hasChildren(x) {
         if (this._hasChildren === x)
             return;