Fix various build warnings.

components/script/dom/bindings/callback.rs

@@ -99,7 +99,7 @@ impl CallbackInterface {
                                  -> Result<JSVal, ()> {
         let mut callable = UndefinedValue();
         unsafe {
-            let name = CString::from_slice(name.as_bytes());
+            let name = CString::new(name).unwrap();
             if JS_GetProperty(cx, self.callback(), name.as_ptr(), &mut callable) == 0 {
                 return Err(());
             }

components/script/dom/bindings/error.rs

@@ -122,7 +122,7 @@ pub fn report_pending_exception(cx: *mut JSContext, obj: *mut JSObject) {
 pub fn throw_not_in_union(cx: *mut JSContext, names: &'static str) -> JSBool {
     assert!(unsafe { JS_IsExceptionPending(cx) } == 0);
     let message = format!("argument could not be converted to any of: {}", names);
-    let string = CString::from_slice(message.as_bytes());
+    let string = CString::new(message).unwrap();
     unsafe { ReportError(cx, string.as_ptr()) };
     return 0;
 }
@@ -153,7 +153,7 @@ unsafe extern fn get_error_message(_user_ref: *mut libc::c_void,
 
 /// Throw a `TypeError` with the given message.
 pub fn throw_type_error(cx: *mut JSContext, error: &str) {
-    let error = CString::from_slice(error.as_bytes());
+    let error = CString::new(error).unwrap();
     unsafe {
         JS_ReportErrorNumber(cx,
             Some(get_error_message as

components/script/dom/bindings/trace.rs

@@ -92,7 +92,7 @@ pub fn trace_jsval(tracer: *mut JSTracer, description: &str, val: JSVal) {
     }
 
     unsafe {
-        let name = CString::from_slice(description.as_bytes());
+        let name = CString::new(description).unwrap();
         (*tracer).debugPrinter = None;
         (*tracer).debugPrintIndex = -1;
         (*tracer).debugPrintArg = name.as_ptr() as *const libc::c_void;
@@ -110,7 +110,7 @@ pub fn trace_reflector(tracer: *mut JSTracer, description: &str, reflector: &Ref
 /// Trace a `JSObject`.
 pub fn trace_object(tracer: *mut JSTracer, description: &str, obj: *mut JSObject) {
     unsafe {
-        let name = CString::from_slice(description.as_bytes());
+        let name = CString::new(description).unwrap();
         (*tracer).debugPrinter = None;
         (*tracer).debugPrintIndex = -1;
         (*tracer).debugPrintArg = name.as_ptr() as *const libc::c_void;

components/script/dom/bindings/utils.rs

@@ -197,7 +197,7 @@ pub fn do_create_interface_objects(cx: *mut JSContext, global: *mut JSObject,
 
     match constructor {
         Some((native, name, nargs)) => {
-            let s = CString::from_slice(name.as_bytes());
+            let s = CString::new(name).unwrap();
             create_interface_object(cx, global, receiver,
                                     native, nargs, proto,
                                     members, s.as_ptr())
@@ -516,7 +516,7 @@ pub fn get_dictionary_property(cx: *mut JSContext,
         }
     }
 
-    let property = CString::from_slice(property.as_bytes());
+    let property = CString::new(property).unwrap();
     if object.is_null() {
         return Ok(None);
     }