DevTools: More code reduce via using document.createElementWithClass and document.createChild.

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 139 matching lines @@
 
     /**
      * @param {string} x
      */
     set text(x)
     {
         this._removeSuggestionAids();
         if (!x) {
             // Append a break element instead of setting textContent to make sure the selection is inside the prompt.
             this._element.removeChildren();
-            this._element.appendChild(document.createElement("br"));
-        } else
+            this._element.createChild("br");
+        } else {
             this._element.textContent = x;
+        }
 
         this.moveCaretToEndOfPrompt();
         this._element.scrollIntoView();
     },
 
     _removeFromElement: function()
     {
         this.clearAutoComplete(true);
         this._element.removeEventListener("keydown", this._boundOnKeyDown, false);
         this._element.removeEventListener("input", this._boundOnInput, false);
@@ skipping 301 matching lines @@
             this._userEnteredRange.deleteContents();
             this._element.normalize();
             var finalSelectionRange = document.createRange();
             var completionText = completions[selectedIndex];
             var prefixText = completionText.substring(0, wordPrefixLength);
             var suffixText = completionText.substring(wordPrefixLength);
 
             var prefixTextNode = document.createTextNode(prefixText);
             fullWordRange.insertNode(prefixTextNode);
 
-            this.autoCompleteElement = document.createElement("span");
-            this.autoCompleteElement.className = "auto-complete-text";
+            this.autoCompleteElement = document.createElementWithClass("span", "auto-complete-text");
             this.autoCompleteElement.textContent = suffixText;
 
             prefixTextNode.parentNode.insertBefore(this.autoCompleteElement, prefixTextNode.nextSibling);
 
             finalSelectionRange.setStart(prefixTextNode, wordPrefixLength);
             finalSelectionRange.setEnd(prefixTextNode, wordPrefixLength);
             selection.removeAllRanges();
             selection.addRange(finalSelectionRange);
             this.dispatchEventToListeners(WebInspector.TextPrompt.Events.ItemApplied);
         }
@@ skipping 403 matching lines @@
 
             return;
         }
 
         WebInspector.TextPrompt.prototype.onKeyDown.apply(this, arguments);
     },
 
     __proto__: WebInspector.TextPrompt.prototype
 }