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

Source/core/svg/SVGFEImageElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2010 Dirk Schulze <krit@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 78 matching lines @@
     if (m_cachedImage)
         m_cachedImage->addClient(this);
 }
 
 void SVGFEImageElement::buildPendingResource()
 {
     clearResourceReferences();
     if (!inDocument())
         return;
 
-    String id;
+    AtomicString id;
     Element* target = SVGURIReference::targetElementFromIRIString(hrefCurrentValue(), document(), &id);
     if (!target) {
         if (id.isEmpty())
             fetchImageResource();
         else {
             document().accessSVGExtensions()->addPendingResource(id, this);
             ASSERT(hasPendingResources());
         }
     } else if (target->isSVGElement()) {
         // Register us with the target in the dependencies map. Any change of hrefElement
@@ skipping 92 matching lines @@
 }
 
 PassRefPtr<FilterEffect> SVGFEImageElement::build(SVGFilterBuilder*, Filter* filter)
 {
     if (m_cachedImage)
         return FEImage::createWithImage(filter, m_cachedImage->imageForRenderer(renderer()), preserveAspectRatioCurrentValue());
     return FEImage::createWithIRIReference(filter, document(), hrefCurrentValue(), preserveAspectRatioCurrentValue());
 }
 
 }