Adding WebVR temporary presentation handling on mobile

third_party/WebKit/Source/modules/vr/VRDisplayEventInit.idl

Index: third_party/WebKit/Source/modules/vr/VRDisplayEventInit.idl
diff --git a/third_party/WebKit/Source/modules/vr/VRDisplayEventInit.idl b/third_party/WebKit/Source/modules/vr/VRDisplayEventInit.idl
new file mode 100644
index 0000000000000000000000000000000000000000..b223f2c7dc6425ec6e0cc85bdcb2be1510f84952
--- /dev/null
+++ b/third_party/WebKit/Source/modules/vr/VRDisplayEventInit.idl
@@ -0,0 +1,11 @@
+// Copyright 2016 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/webvr/#interface-vrdisplayeventinit
+[
+    RuntimeEnabled=WebVR
+] dictionary VRDisplayEventInit : EventInit {
+    VRDisplay display;
+    VRDisplayEventReason reason;
+};