Store marker identifiers as AtomicString

Source/core/rendering/svg/SVGResources.cpp

 /*
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 233 matching lines @@
         }
 
         if (style->hasMasker()) {
             AtomicString id = style->maskerResource();
             if (!ensureResources(resources)->setMasker(getRenderSVGResourceById<RenderSVGResourceMasker>(document, id)))
                 registerPendingResource(extensions, id, element);
         }
     }
 
     if (markerTags().contains(tagName) && style->hasMarkers()) {
-        AtomicString markerStartId(style->markerStartResource());
+        const AtomicString& markerStartId = style->markerStartResource();
         if (!ensureResources(resources)->setMarkerStart(getRenderSVGResourceById<RenderSVGResourceMarker>(document, markerStartId)))
             registerPendingResource(extensions, markerStartId, element);
 
-        AtomicString markerMidId(style->markerMidResource());
+        const AtomicString& markerMidId = style->markerMidResource();
         if (!ensureResources(resources)->setMarkerMid(getRenderSVGResourceById<RenderSVGResourceMarker>(document, markerMidId)))
             registerPendingResource(extensions, markerMidId, element);
 
-        AtomicString markerEndId(style->markerEndResource());
-        if (!ensureResources(resources)->setMarkerEnd(getRenderSVGResourceById<RenderSVGResourceMarker>(document, markerEndId)))
+        const AtomicString& markerEndId = style->markerEndResource();
+        if (!ensureResources(resources)->setMarkerEnd(getRenderSVGResourceById<RenderSVGResourceMarker>(document, style->markerEndResource())))
             registerPendingResource(extensions, markerEndId, element);
     }
 
     if (fillAndStrokeTags().contains(tagName)) {
         if (style->hasFill()) {
             bool hasPendingResource = false;
             AtomicString id;
             RenderSVGResourceContainer* resource = paintingResourceFromSVGPaint(document, style->fillPaintType(), style->fillPaintUri(), id, hasPendingResource);
             if (!ensureResources(resources)->setFill(resource) && hasPendingResource) {
                 registerPendingResource(extensions, id, element);
@@ skipping 425 matching lines @@
         if (RenderSVGResourceContainer* stroke = m_fillStrokeData->stroke)
             fprintf(stderr, " |-> Stroke     : %p (node=%p)\n", stroke, stroke->element());
     }
 
     if (m_linkedResource)
         fprintf(stderr, " |-> xlink:href : %p (node=%p)\n", m_linkedResource, m_linkedResource->element());
 }
 #endif
 
 }