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

modules/mediacapturefromelement/CanvasCaptureMediaStreamTrack.idl

Index: modules/mediacapturefromelement/CanvasCaptureMediaStreamTrack.idl
diff --git a/modules/mediacapturefromelement/CanvasCaptureMediaStreamTrack.idl b/modules/mediacapturefromelement/CanvasCaptureMediaStreamTrack.idl
new file mode 100644
index 0000000000000000000000000000000000000000..69c5fef3f1f6d57a5ba6ea05f991d1823fc2c21d
--- /dev/null
+++ b/modules/mediacapturefromelement/CanvasCaptureMediaStreamTrack.idl
@@ -0,0 +1,11 @@
+// Copyright 2015 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://www.w3.org/TR/mediacapture-fromelement/#the-canvascapturemediastream
+[
+    RuntimeEnabled=MediaCaptureFromCanvas
+] interface CanvasCaptureMediaStreamTrack : MediaStreamTrack {
+    readonly attribute HTMLCanvasElement canvas;
+    void requestFrame ();
+};