Update some code that's feature-gated under core.

1 files changed, 4 insertions, 4 deletions

diff --git a/components/devtools/protocol.rs b/components/devtools/protocol.rs
index 07534df139b..6d978a054dd 100644
--- a/components/devtools/protocol.rs
+++ b/components/devtools/protocol.rs
@@ -20,9 +20,9 @@ impl JsonPacketStream for TcpStream {
     fn write_json_packet<'a, T: Encodable>(&mut self, obj: &T) {
         let s = json::encode(obj).unwrap().replace("__type__", "type");
         println!("<- {}", s);
-        self.write_str(s.len().to_string().as_slice()).unwrap();
+        self.write_str(&s.len().to_string()).unwrap();
         self.write_u8(':' as u8).unwrap();
-        self.write_str(s.as_slice()).unwrap();
+        self.write_str(&s).unwrap();
     }
 
     fn read_json_packet<'a>(&mut self) -> IoResult<Json> {
@@ -35,11 +35,11 @@ impl JsonPacketStream for TcpStream {
                 Ok(c) if c != colon => buffer.push(c as u8),
                 Ok(_) => {
                     let packet_len_str = String::from_utf8(buffer).unwrap();
-                    let packet_len = num::from_str_radix(packet_len_str.as_slice(), 10).unwrap();
+                    let packet_len = num::from_str_radix(&packet_len_str, 10).unwrap();
                     let packet_buf = self.read_exact(packet_len).unwrap();
                     let packet = String::from_utf8(packet_buf).unwrap();
                     println!("{}", packet);
-                    return Ok(Json::from_str(packet.as_slice()).unwrap())
+                    return Ok(Json::from_str(&packet).unwrap())
                 },
                 Err(ref e) if e.kind == EndOfFile =>
                     return Err(IoError { kind: EndOfFile, desc: "EOF", detail: None }),