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

Source/devtools/front_end/source_frame/GoToLineDialog.js

Index: Source/devtools/front_end/source_frame/GoToLineDialog.js
diff --git a/Source/devtools/front_end/source_frame/GoToLineDialog.js b/Source/devtools/front_end/source_frame/GoToLineDialog.js
index 7e7414c0b7b9b2b072221543096d7fdd3144f9bf..891b072d3ab9663867a670856b7d7cdc385d1139 100644
--- a/Source/devtools/front_end/source_frame/GoToLineDialog.js
+++ b/Source/devtools/front_end/source_frame/GoToLineDialog.js
@@ -37,9 +37,7 @@ WebInspector.GoToLineDialog = function(sourceFrame)
 {
     WebInspector.DialogDelegate.call(this);
 
-    this.element = document.createElement("div");
-    this.element.className = "go-to-line-dialog";
-
+    this.element = document.createElementWithClass("div", "go-to-line-dialog");
     this.element.createChild("label").textContent = WebInspector.UIString("Go to line: ");
 
     this._input = this.element.createChild("input");