Updated Blink WebVR interfaces to WebVR v1 spec

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

+// 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.
+
+// http://mozvr.github.io/webvr-spec/webvr.html#vrdisplaycapabilities
+[
+    RuntimeEnabled=WebVR
+] interface VRDisplayCapabilities {
+  // Whether or not the VR display is capable of reporting user orientation.
+  readonly attribute boolean hasOrientation;
+
+  // Whether or not the VR display is capable of reporting user position.
+  // If false position may still be reported using simulated values like
+  // neck modeling.
+  readonly attribute boolean hasPosition;
+
+  // Whether or not the VRDisplay is separate from the device’s primary display.
+  // If presenting VR content will obscure other content on the device, this
+  // should be false. When false VR content should not be mirrored.
+  readonly attribute boolean hasExternalDisplay;
+
+  // Whether or not the VRDisplay is capable of presenting content to an HMD or
+  // similar device. Can be used to indicate “magic window” devices that are
+  // capable of 6DoF tracking but for which requestPresent is not meaningful. If
+  // false then calls to requestPresent should always fail, and getEyeParameters
+  // should return null.
+  readonly attribute boolean canPresent;
+
+  // The maximum length of the array that VRDisplay.requestPresent will accept.
+  readonly attribute unsigned long maxLayers;
+};