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

Source/core/rendering/style/SVGRenderStyleDefs.h

 /*
     Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005 Rob Buis <buis@kde.org>
     Copyright (C) Research In Motion Limited 2010. All rights reserved.
 
     Based on khtml code by:
     Copyright (C) 2000-2003 Lars Knoll (knoll@kde.org)
               (C) 2000 Antti Koivisto (koivisto@kde.org)
               (C) 2000-2003 Dirk Mueller (mueller@kde.org)
               (C) 2002-2003 Apple Computer, Inc.
@@ skipping 217 matching lines @@
     public:
         static PassRefPtr<StyleResourceData> create() { return adoptRef(new StyleResourceData); }
         PassRefPtr<StyleResourceData> copy() const { return adoptRef(new StyleResourceData(*this)); }
 
         bool operator==(const StyleResourceData&) const;
         bool operator!=(const StyleResourceData& other) const
         {
             return !(*this == other);
         }
 
-        String clipper;
-        String filter;
-        String masker;
+        AtomicString clipper;
+        AtomicString filter;
+        AtomicString masker;
 
     private:
         StyleResourceData();
         StyleResourceData(const StyleResourceData&);
     };
 
     // Inherited resources
     class StyleInheritedResourceData : public RefCounted<StyleInheritedResourceData> {
     public:
         static PassRefPtr<StyleInheritedResourceData> create() { return adoptRef(new StyleInheritedResourceData); }
@@ skipping 10 matching lines @@
         String markerEnd;
 
     private:
         StyleInheritedResourceData();
         StyleInheritedResourceData(const StyleInheritedResourceData&);
     };
 
 } // namespace WebCore
 
 #endif // SVGRenderStyleDefs_h