servo: Merge #8922 - Fix warnings: Use Vec.extend_from_slice instead of Vec.push_all (from saneyuki:warning); r=mbrubeck

Source-Repo: https://github.com/servo/servo
Source-Revision: d01233a7b417c87b18d31f10709ed83141887b94

servo/components/script/dom/blob.rs

@@ -140,7 +140,7 @@ impl BlobMethods for Blob {
                 let start = relativeStart.to_usize().unwrap();
                 let end = (relativeStart + span).to_usize().unwrap();
                 let mut bytes: Vec<u8> = Vec::new();
-                bytes.push_all(&vec[start..end]);
+                bytes.extend_from_slice(&vec[start..end]);
                 Blob::new(global.r(), Some(bytes), &relativeContentType)
             }
         }