std: Stabilize APIs for the 1.8 release

This commit is the result of the FCPs ending for the 1.8 release cycle for both
the libs and the lang suteams. The full list of changes are:

Stabilized

* `braced_empty_structs`
* `augmented_assignments`
* `str::encode_utf16` - renamed from `utf16_units`
* `str::EncodeUtf16` - renamed from `Utf16Units`
* `Ref::map`
* `RefMut::map`
* `ptr::drop_in_place`
* `time::Instant`
* `time::SystemTime`
* `{Instant,SystemTime}::now`
* `{Instant,SystemTime}::duration_since` - renamed from `duration_from_earlier`
* `{Instant,SystemTime}::elapsed`
* Various `Add`/`Sub` impls for `Time` and `SystemTime`
* `SystemTimeError`
* `SystemTimeError::duration`
* Various impls for `SystemTimeError`
* `UNIX_EPOCH`
* `ops::{Add,Sub,Mul,Div,Rem,BitAnd,BitOr,BitXor,Shl,Shr}Assign`

Deprecated

* Scoped TLS (the `scoped_thread_local!` macro)
* `Ref::filter_map`
* `RefMut::filter_map`
* `RwLockReadGuard::map`
* `RwLockWriteGuard::map`
* `Condvar::wait_timeout_with`

Closes #27714
Closes #27715
Closes #27746
Closes #27748
Closes #27908
Closes #29866

2 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd/sys/windows/compat.rs b/src/libstd/sys/windows/compat.rs
index 780a0d9427d..acbfacce8bd 100644
--- a/src/libstd/sys/windows/compat.rs
+++ b/src/libstd/sys/windows/compat.rs
@@ -28,7 +28,7 @@ use sync::atomic::{AtomicUsize, Ordering};
 use sys::c;
 
 pub fn lookup(module: &str, symbol: &str) -> Option<usize> {
-    let mut module: Vec<u16> = module.utf16_units().collect();
+    let mut module: Vec<u16> = module.encode_utf16().collect();
     module.push(0);
     let symbol = CString::new(symbol).unwrap();
     unsafe {
diff --git a/src/libstd/sys/windows/stdio.rs b/src/libstd/sys/windows/stdio.rs
index 8f37dc02e87..1cd05b61d25 100644
--- a/src/libstd/sys/windows/stdio.rs
+++ b/src/libstd/sys/windows/stdio.rs
@@ -56,7 +56,7 @@ fn write(out: &Output, data: &[u8]) -> io::Result<usize> {
         Output::Pipe(ref p) => return p.get().write(data),
     };
     let utf16 = match str::from_utf8(data).ok() {
-        Some(utf8) => utf8.utf16_units().collect::<Vec<u16>>(),
+        Some(utf8) => utf8.encode_utf16().collect::<Vec<u16>>(),
         None => return Err(invalid_encoding()),
     };
     let mut written = 0;