Reverting base class for CachedSVGDocumentReference to avoid platform layering violations

Source/WebCore/css/StyleResolver.cpp

Index: Source/WebCore/css/StyleResolver.cpp
diff --git a/Source/WebCore/css/StyleResolver.cpp b/Source/WebCore/css/StyleResolver.cpp
index 4fa74a033b150c04d95b687d6e1d010d50d1726b..4b453bb375a63426049fc94bb554f80828464f90 100644
--- a/Source/WebCore/css/StyleResolver.cpp
+++ b/Source/WebCore/css/StyleResolver.cpp
@@ -3767,7 +3767,7 @@ void StyleResolver::loadPendingSVGDocuments()
                 continue;
 
             // Stash the CachedSVGDocument on the reference filter.
-            referenceFilter->setCachedSVGDocumentReference(adoptPtr(new CachedSVGDocumentReference(cachedDocument)));
+            referenceFilter->setData(adoptPtr(new CachedSVGDocumentReference(cachedDocument)));
         }
     }
     state.pendingSVGDocuments().clear();
@@ -4141,7 +4141,7 @@ bool StyleResolver::createFilterOperations(CSSValue* inValue, RenderStyle* style
                 if (!svgDocumentValue->loadRequested())
                     m_state.pendingSVGDocuments().set(operation.get(), svgDocumentValue);
                 else if (svgDocumentValue->cachedSVGDocument())
-                    operation->setCachedSVGDocumentReference(adoptPtr(new CachedSVGDocumentReference(svgDocumentValue->cachedSVGDocument())));
+                    operation->setData(adoptPtr(new CachedSVGDocumentReference(svgDocumentValue->cachedSVGDocument())));
             }
             operations.operations().append(operation);
 #endif