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

modules/mediacapturefromelement/HTMLCanvasElementCapture.idl

Index: modules/mediacapturefromelement/HTMLCanvasElementCapture.idl
diff --git a/modules/mediacapturefromelement/HTMLCanvasElementCapture.idl b/modules/mediacapturefromelement/HTMLCanvasElementCapture.idl
new file mode 100644
index 0000000000000000000000000000000000000000..ca2cc7437f40cf66e52cf04baf2ff74b2c70ee1d
--- /dev/null
+++ b/modules/mediacapturefromelement/HTMLCanvasElementCapture.idl
@@ -0,0 +1,10 @@
+// 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/#html-canvas-element-media-capture-extensions
+[
+    RuntimeEnabled=MediaCaptureFromCanvas
+] partial interface HTMLCanvasElement {
+    [RaisesException] MediaStream captureStream (optional double frameRate);
+};