Adding WebVR temporary presentation handling on mobile

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

Index: third_party/WebKit/Source/modules/vr/VRDisplayEvent.idl
diff --git a/third_party/WebKit/Source/modules/vr/VRDisplayEvent.idl b/third_party/WebKit/Source/modules/vr/VRDisplayEvent.idl
new file mode 100644
index 0000000000000000000000000000000000000000..230251f882010449616de313da8c288d68502892
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+++ b/third_party/WebKit/Source/modules/vr/VRDisplayEvent.idl
@@ -0,0 +1,20 @@
+// 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.
+
+enum VRDisplayEventReason {
+    "connected",
+    "disconnected",
+    "navigation",
+    "mounted",
+    "unmounted"
+};
+
+// https://w3c.github.io/webvr/#interface-vrdisplayevent
+[
+    RuntimeEnabled=WebVR,
+    Constructor(DOMString type, optional VRDisplayEventInit eventInitDict),
+] interface VRDisplayEvent : Event {
+    readonly attribute VRDisplay display;
+    readonly attribute VRDisplayEventReason reason;
+};