Roll IDL to multivm@1329

modules/mediasource/URLMediaSource.idl

Index: modules/mediasource/URLMediaSource.idl
diff --git a/core/dom/Promise.idl b/modules/mediasource/URLMediaSource.idl
similarity index 84%
copy from core/dom/Promise.idl
copy to modules/mediasource/URLMediaSource.idl
index 893b8eefcf88606ebbdc2d59962a106e074795a6..6adb9f165415edaaa07ed8caf0668ef7ea2148a4 100644
--- a/core/dom/Promise.idl
+++ b/modules/mediasource/URLMediaSource.idl
@@ -27,9 +27,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-
-[
-   CustomConstructor(any init),
-   EnabledAtRuntime=promise
-] interface Promise {
+partial interface URL {
+    [CallWith=ScriptExecutionContext,TreatReturnedNullStringAs=Null] static DOMString createObjectURL(MediaSource? source);
+    [CallWith=ScriptExecutionContext,TreatReturnedNullStringAs=Null] static DOMString createObjectURL(WebKitMediaSource? source);
 };