Move task::task() to TaskBuilder::new()

The constructor for `TaskBuilder` is being changed to an associated
function called `new` for consistency with the rest of the standard
library.

Closes #13666

[breaking-change]

1 files changed, 2 insertions, 1 deletions

diff --git a/src/libsync/lock.rs b/src/libsync/lock.rs
index 911cd1d2eb1..930b3009042 100644
--- a/src/libsync/lock.rs
+++ b/src/libsync/lock.rs
@@ -445,6 +445,7 @@ impl Barrier {
 mod tests {
     use std::comm::Empty;
     use std::task;
+    use std::task::TaskBuilder;
 
     use arc::Arc;
     use super::{Mutex, Barrier, RWLock};
@@ -614,7 +615,7 @@ mod tests {
         let mut children = Vec::new();
         for _ in range(0, 5) {
             let arc3 = arc.clone();
-            let mut builder = task::task();
+            let mut builder = TaskBuilder::new();
             children.push(builder.future_result());
             builder.spawn(proc() {
                 let lock = arc3.read();