Don't reload an svg <use> element's xlink:href if only the fragment changes

third_party/WebKit/Source/core/svg/SVGUseElement.cpp

Index: third_party/WebKit/Source/core/svg/SVGUseElement.cpp
diff --git a/third_party/WebKit/Source/core/svg/SVGUseElement.cpp b/third_party/WebKit/Source/core/svg/SVGUseElement.cpp
index f1023a8fbf36b6075cc938a51c896f6eef4f8ccc..4e5725217cd392a5b434ffe46548b1ece4d47e3d 100644
--- a/third_party/WebKit/Source/core/svg/SVGUseElement.cpp
+++ b/third_party/WebKit/Source/core/svg/SVGUseElement.cpp
@@ -237,7 +237,8 @@ void SVGUseElement::svgAttributeChanged(const QualifiedName& attrName)
         SVGElement::InvalidationGuard invalidationGuard(this);
         if (isStructurallyExternal()) {
             KURL url = document().completeURL(hrefString());
-            if (url.hasFragmentIdentifier()) {
+            const KURL& existingURL = m_resource ? m_resource->url() : KURL();
+            if (url.hasFragmentIdentifier() && !equalIgnoringFragmentIdentifier(url, existingURL)) {
                 FetchRequest request(ResourceRequest(url), localName());
                 setDocumentResource(DocumentResource::fetchSVGDocument(request, document().fetcher()));
             }