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

modules/canvas2d/TouchHitRegion.idl

Index: modules/canvas2d/TouchHitRegion.idl
diff --git a/modules/canvas2d/TouchHitRegion.idl b/modules/canvas2d/TouchHitRegion.idl
new file mode 100644
index 0000000000000000000000000000000000000000..50c6a92d3eed7cd3f6653f51af40bb8c6457a0e5
--- /dev/null
+++ b/modules/canvas2d/TouchHitRegion.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://html.spec.whatwg.org/multipage/scripting.html#Touch-partial
+
+[
+    RuntimeEnabled=ExperimentalCanvasFeatures
+] partial interface Touch {
+    readonly attribute DOMString? region;
+};