Make calls to AtomicString(const String&) explicit in page/

Source/core/page/PageSerializer.cpp

 /*
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 145 matching lines @@
     Frame* frame = frameOwner->contentFrame();
     if (!frame)
         return;
 
     KURL url = frame->document()->url();
     if (url.isValid() && !url.isBlankURL())
         return;
 
     // We need to give a fake location to blank frames so they can be referenced by the serialized frame.
     url = m_serializer->urlForBlankFrame(frame);
-    appendAttribute(out, element, Attribute(frameOwnerURLAttributeName(*frameOwner), url.string()), namespaces);
+    appendAttribute(out, element, Attribute(frameOwnerURLAttributeName(*frameOwner), AtomicString(url.string())), namespaces);
 }
 
 void SerializerMarkupAccumulator::appendEndTag(Node* node)
 {
     if (node->isElementNode() && !shouldIgnoreElement(toElement(node)))
         MarkupAccumulator::appendEndTag(node);
 }
 
 PageSerializer::PageSerializer(Vector<SerializedResource>* resources)
     : m_resources(resources)
@@ skipping 199 matching lines @@
     if (iter != m_blankFrameURLs.end())
         return iter->value;
     String url = "wyciwyg://frame/" + String::number(m_blankFrameCounter++);
     KURL fakeURL(ParsedURLString, url);
     m_blankFrameURLs.add(frame, fakeURL);
 
     return fakeURL;
 }
 
 }