Not for review - Rebase of crrev.com/62833003

Source/core/workers/UIWorkerGlobalScope.idl

Index: Source/core/workers/UIWorkerGlobalScope.idl
diff --git a/Source/core/workers/DedicatedWorkerGlobalScope.idl b/Source/core/workers/UIWorkerGlobalScope.idl
similarity index 89%
copy from Source/core/workers/DedicatedWorkerGlobalScope.idl
copy to Source/core/workers/UIWorkerGlobalScope.idl
index 66bc36994aab85ff0aa13e60dff95bad6785ba97..0f8caa294626776dd8610f3f813614ede6fbf7e1 100644
--- a/Source/core/workers/DedicatedWorkerGlobalScope.idl
+++ b/Source/core/workers/UIWorkerGlobalScope.idl
@@ -29,9 +29,10 @@
  */
 
 [
-    Exposed=DedicatedWorker,
-    Global=(Worker,DedicatedWorker)
-] interface DedicatedWorkerGlobalScope : WorkerGlobalScope {
+    Exposed=UIWorker,
+    Global=(Worker,UIWorker)
+] interface UIWorkerGlobalScope : WorkerGlobalScope {
     [Custom, RaisesException] void postMessage(any message, optional sequence<Transferable> transfer);
     attribute EventHandler onmessage;
+    [RaisesException] void teleportMessage(TeleportContext context, TeleportCallback callback);
 };