DevTools: do not allow using 'this' before call into super.

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

Index: third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js b/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
index 8aa4cc24b78023195d7216596178462f10e88565..9f216cf6d49401bcee6b7169800423947e3fbc4b 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/TextPrompt.js
@@ -31,18 +31,14 @@
  * @constructor
  * @extends {WebInspector.Object}
  * @implements {WebInspector.SuggestBoxDelegate}
- * @param {function(!Element, !Range, boolean, function(!Array.<string>, number=))} completions
- * @param {string=} stopCharacters
  */
-WebInspector.TextPrompt = function(completions, stopCharacters)
+WebInspector.TextPrompt = function()
 {
     /**
      * @type {!Element|undefined}
      */
     this._proxyElement;
     this._proxyElementDisplay = "inline-block";
-    this._loadCompletions = completions;
-    this._completionStopCharacters = stopCharacters || " =:[({;,!+-*/&|^<>.";
     this._autocompletionTimeout = WebInspector.TextPrompt.DefaultAutocompletionTimeout;
     this._title = "";
     this._previousText = "";
@@ -60,6 +56,16 @@ WebInspector.TextPrompt.Events = {
 
 WebInspector.TextPrompt.prototype = {
     /**
+     * @param {function(!Element, !Range, boolean, function(!Array.<string>, number=))} completions
+     * @param {string=} stopCharacters
+     */
+    initialize: function(completions, stopCharacters)
+    {
+        this._loadCompletions = completions;
+        this._completionStopCharacters = stopCharacters || " =:[({;,!+-*/&|^<>.";
+    },
+
+    /**
      * @param {number} timeout
      */
     setAutocompletionTimeout: function(timeout)
@@ -796,7 +802,8 @@ WebInspector.TextPrompt.prototype = {
  */
 WebInspector.TextPromptWithHistory = function(completions, stopCharacters)
 {
-    WebInspector.TextPrompt.call(this, completions, stopCharacters);
+    WebInspector.TextPrompt.call(this);
+    this.initialize(completions, stopCharacters);
 
     this._history = new WebInspector.HistoryManager();
     this._addCompletionsFromHistory = true;