Move Image ownership out of CSSValue

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index ba5c7821706e1435499ee6ffa341c677a4bd57d5..1fc9c291b0ba70c35771307da9dca4a96a9da3c6 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -3104,8 +3104,15 @@ static void reResolveURLsInInlineStyle(const Document& document, MutableStylePro
     for (unsigned i = 0; i < style.propertyCount(); ++i) {
         StylePropertySet::PropertyReference property = style.propertyAt(i);
         // FIXME: Should handle all URL-based properties: CSSImageSetValue, CSSCursorImageValue, etc.
-        if (property.value()->isImageValue())
-            toCSSImageValue(property.value())->reResolveURL(document);
+        if (property.value()->isImageValue()) {
+            const CSSImageValue& image = toCSSImageValue(*property.value());
+            String relativeUrl = image.relativeUrl();
+            String absoluteUrl = image.url();
+            if (document.completeURL(relativeUrl) == absoluteUrl)
+                continue;
+            style.removeProperty(property.id());
+            style.setProperty(property.id(), CSSImageValue::create(relativeUrl, absoluteUrl));
+        }
     }
 }