Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

modules/presentation/Presentation.idl

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // https://w3c.github.io/presentation-api/#interface-presentation
 
 [
     GarbageCollected,
     RuntimeEnabled=Presentation
-] interface Presentation : EventTarget {
-    // This API used by controlling browsing context.
-    [CallWith=ScriptState] Promise<PresentationSession> startSession(DOMString url);
-    // TODO(avayvod): The |presentationId| argument should not be optional.
-    [CallWith=ScriptState] Promise<PresentationSession> joinSession(DOMString url, [Default=Undefined] optional DOMString presentationId);
-    [CallWith=ScriptState] Promise<PresentationAvailability> getAvailability(DOMString url);
-    attribute EventHandler ondefaultsessionstart;
+] interface Presentation {
+    [MeasureAs=PresentationDefaultRequest] attribute PresentationRequest? defaultRequest;
 
-    // This API used by presenting browsing context.
-    // TODO(avayvod): The spec has |getSession()| and |getSessions()| instead.
-    readonly attribute PresentationSession? session;
-    // TODO(avayvod): attribute EventHandler onsessionavailable;
+    // This API is available on the receiving browsing context.
+    [RuntimeEnabled=PresentationReceiver, SameObject] readonly attribute PresentationReceiver? receiver;
 };