Refactoring: Generalize CachedSVGDocument for non-SVG use.

Source/core/svg/SVGUseElement.cpp

Index: Source/core/svg/SVGUseElement.cpp
diff --git a/Source/core/svg/SVGUseElement.cpp b/Source/core/svg/SVGUseElement.cpp
index 13008a5b2dd54de8de8ef72542231cb0aced23ad..8a5eaff50138cdab860fbd54b378b2e7ecd6cb49 100644
--- a/Source/core/svg/SVGUseElement.cpp
+++ b/Source/core/svg/SVGUseElement.cpp
@@ -39,9 +39,9 @@
 #include "core/dom/RegisteredEventListener.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/ShadowRoot.h"
+#include "core/loader/cache/CachedDocument.h"
 #include "core/loader/cache/CachedResourceLoader.h"
 #include "core/loader/cache/CachedResourceRequest.h"
-#include "core/loader/cache/CachedSVGDocument.h"
 #include "core/rendering/svg/RenderSVGResource.h"
 #include "core/rendering/svg/RenderSVGTransformableContainer.h"
 #include "core/svg/SVGElementInstance.h"
@@ -993,7 +993,7 @@ void SVGUseElement::finishParsingChildren()
     }
 }
 
-void SVGUseElement::setCachedDocument(CachedResourceHandle<CachedSVGDocument> cachedDocument)
+void SVGUseElement::setCachedDocument(CachedResourceHandle<CachedDocument> cachedDocument)
 {
     if (m_cachedDocument == cachedDocument)
         return;