[DevTools] Introduce a setting for console autocomplete from history.

third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js

 /*
  * Copyright (C) 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  *
  * 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
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 796 matching lines @@
     /**
      * @type {!Array.<string>}
      */
     this._data = [];
 
     /**
      * 1-based entry in the history stack.
      * @type {number}
      */
     this._historyOffset = 1;
+
+    this._addCompletionsFromHistory = true;
 }
 
 WebInspector.TextPromptWithHistory.prototype = {
     /**
      * @return {!Array.<string>}
      */
     historyData: function()
     {
         // FIXME: do we need to copy this?
         return this._data;
     },
 
     /**
      * @override
      * @param {string} prefix
      * @return {!WebInspector.SuggestBox.Suggestions}
      */
     additionalCompletions: function(prefix)
     {
-        if (!this.isCaretAtEndOfPrompt())
+        if (!this._addCompletionsFromHistory || !this.isCaretAtEndOfPrompt())
             return [];
         var result = [];
         var text = this.text();
         var set = new Set();
         for (var i = this._data.length - 1; i >= 0 && result.length < 50; --i) {
             var item = this._data[i];
             if (!item.startsWith(text))
                 continue;
             if (set.has(item))
                 continue;
             set.add(item);
             result.push({title: item.substring(text.length - prefix.length), className: "additional"});
         }
         return result;
     },
 
     /**
      * @param {!Array.<string>} data
      */
     setHistoryData: function(data)
     {
         this._data = [].concat(data);
         this._historyOffset = 1;
     },
 
     /**
+     * @param {boolean} value
+     */
+    setAddCompletionsFromHistory: function(value)
+    {
+        this._addCompletionsFromHistory = value;
+    },
+
+    /**
      * Pushes a committed text into the history.
      * @param {string} text
      */
     pushHistoryItem: function(text)
     {
         if (this._uncommittedIsTop) {
             this._data.pop();
             delete this._uncommittedIsTop;
         }
 
@@ skipping 101 matching lines @@
 
             return;
         }
 
         WebInspector.TextPrompt.prototype.onKeyDown.apply(this, arguments);
     },
 
     __proto__: WebInspector.TextPrompt.prototype
 }