[DevTools] Replace usages of document with custom functions.

Source/devtools/front_end/ui/TabbedPane.js

Index: Source/devtools/front_end/ui/TabbedPane.js
diff --git a/Source/devtools/front_end/ui/TabbedPane.js b/Source/devtools/front_end/ui/TabbedPane.js
index de7efc4ad6d35ca1cde3bbaf7ba3473061423684..77522d621aeec4a64eccbcfd4136e8d40d2d108e 100644
--- a/Source/devtools/front_end/ui/TabbedPane.js
+++ b/Source/devtools/front_end/ui/TabbedPane.js
@@ -520,7 +520,7 @@ WebInspector.TabbedPane.prototype = {
 
     _createDropDownButton: function()
     {
-        var dropDownContainer = document.createElementWithClass("div", "tabbed-pane-header-tabs-drop-down-container");
+        var dropDownContainer = createElementWithClass("div", "tabbed-pane-header-tabs-drop-down-container");
         var dropDownButton = dropDownContainer.createChild("div", "tabbed-pane-header-tabs-drop-down");
         dropDownButton.createTextChild("\u00bb");
 
@@ -926,7 +926,7 @@ WebInspector.TabbedPaneTab.prototype = {
 
     _createIconElement: function(tabElement, titleElement)
     {
-        var iconElement = document.createElementWithClass("span", "tabbed-pane-header-tab-icon " + this._iconClass);
+        var iconElement = createElementWithClass("span", "tabbed-pane-header-tab-icon " + this._iconClass);
         if (this._iconTooltip)
             iconElement.title = this._iconTooltip;
         tabElement.insertBefore(iconElement, titleElement);
@@ -939,7 +939,7 @@ WebInspector.TabbedPaneTab.prototype = {
      */
     _createTabElement: function(measuring)
     {
-        var tabElement = document.createElementWithClass("div", "tabbed-pane-header-tab");
+        var tabElement = createElementWithClass("div", "tabbed-pane-header-tab");
         tabElement.id = "tab-" + this._id;
         tabElement.tabIndex = -1;
         tabElement.selectTabForTest = this._tabbedPane.selectTab.bind(this._tabbedPane, this.id, true);