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

modules/presentation/PresentationSession.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-presentationsession
-
-enum PresentationSessionState {
-    "connected",
-    "disconnected"
-};
-
-[
-    GarbageCollected,
-    RuntimeEnabled=Presentation
-] interface PresentationSession : EventTarget {
-    readonly attribute DOMString? id;
-    readonly attribute PresentationSessionState state;
-    void close();
-    attribute EventHandler onstatechange;
-
-    // Communication
-    attribute BinaryType binaryType;
-    attribute EventHandler onmessage;
-    [RaisesException] void send(DOMString message);
-    [RaisesException] void send(Blob data);
-    [RaisesException] void send(ArrayBuffer data);
-    [RaisesException] void send(ArrayBufferView data);
-};