Refactoring: Simplify DocumentWriter by reorganizing its lifetime.

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple 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 1930 matching lines @@
 
 String Internals::getImageSourceURL(Element* element, ExceptionCode& ec)
 {
     if (!element) {
         ec = INVALID_ACCESS_ERR;
         return String();
     }
     return element->imageSourceURL();
 }
 
+String Internals::baseURL(Document* document, ExceptionCode& ec)
+{
+    if (!document) {
+        ec = INVALID_ACCESS_ERR;
+        return String();
+    }
+
+    return document->baseURL().string();
+}
+
 bool Internals::isSelectPopupVisible(Node* node)
 {
     if (!isHTMLSelectElement(node))
         return false;
 
     HTMLSelectElement* select = toHTMLSelectElement(node);
 
     RenderObject* renderer = select->renderer();
     if (!renderer->isMenuList())
         return false;
 
     RenderMenuList* menuList = toRenderMenuList(renderer);
     return menuList->popupIsVisible();
 }
 
 }