Update WebVR API based on prerelease 1.1 except window and navigator interface

third_party/WebKit/Source/modules/vr/VRLayer.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.
-
-typedef (HTMLCanvasElement or OffscreenCanvas) VRSource;
-
-// https://w3c.github.io/webvr/#interface-vrlayer
-
-dictionary VRLayer {
-  // The canvas to be presented to the VRDisplay
-  VRSource? source = null;
-
-  // The left and right bounds contain 4 git statvalues defining the texture bounds
-  // within the canvas to present to the eye in UV space.
-  // [0] left offset of the bounds (0.0 - 1.0)
-  // [1] top offset of the bounds (0.0 - 1.0)
-  // [2] width of the bounds (0.0 - 1.0)
-  // [3] height of the bounds (0.0 - 1.0)
-  sequence<float> leftBounds = []; //= [0.0, 0.0, 0.5, 1.0];
-  sequence<float> rightBounds = []; //= [0.5, 0.0, 0.5, 1.0];
-};