Auto merge of #21533 - nupurbaghel:current_src, r=jdm

correct currentSrc function

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(recreating PR which got closed earlier https://github.com/servo/servo/pull/21521)
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- [ ] These changes fix #__ (github issue number if applicable).

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components/script/dom/htmlimageelement.rs

@@ -1147,10 +1147,16 @@ impl HTMLImageElementMethods for HTMLImageElement {
 
     // https://html.spec.whatwg.org/multipage/#dom-img-currentsrc
     fn CurrentSrc(&self) -> DOMString {
-        let ref url = self.current_request.borrow().source_url;
+        let ref url = self.current_request.borrow().parsed_url;
         match *url {
-            Some(ref url) => url.clone(),
-            None => DOMString::from(""),
+            Some(ref url) => DOMString::from_string(url.clone().into_string()),
+            None => {
+                let ref unparsed_url = self.current_request.borrow().source_url;
+                match *unparsed_url {
+                    Some(ref url) => url.clone(),
+                    None => DOMString::from("")
+                }
+            },
         }
     }