DevTools: keep the stick to bottom behavior and update scroll bar position while iterating console …

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 /**
  * @unrestricted
  */
 Console.ConsolePrompt = class extends UI.Widget {
   constructor() {
     super();
     this._addCompletionsFromHistory = true;
@@ skipping 119 matching lines @@
 
     if (newText === undefined)
       return;
     keyboardEvent.consume(true);
     this.setText(newText);
 
     if (isPrevious)
       this._editor.setSelection(Common.TextRange.createFromLocation(0, Infinity));
     else
       this.moveCaretToEndOfPrompt();
+    this.setMinimumSize(0, this._editor.widget().element.offsetHeight);
   }
 
   /**
    * @param {!KeyboardEvent} event
    */
   _enterKeyPressed(event) {
     if (event.altKey || event.ctrlKey || event.shiftKey)
       return;
 
     event.consume(true);
@@ skipping 207 matching lines @@
     return this._currentHistoryItem();
   }
 
   /**
    * @return {string|undefined}
    */
   _currentHistoryItem() {
     return this._data[this._data.length - this._historyOffset];
   }
 };