Adding WebVR interface to Blink

Source/modules/vr/VREyeParameters.idl

Index: Source/modules/vr/VREyeParameters.idl
diff --git a/Source/modules/vr/VREyeParameters.idl b/Source/modules/vr/VREyeParameters.idl
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+++ b/Source/modules/vr/VREyeParameters.idl
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+// 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.
+
+[
+    RuntimeEnabled=VRDevice,
+    GarbageCollected
+] interface VREyeParameters {
+  /* These values are expected to be static per-device/per-user */
+  readonly attribute VRFieldOfView minimumFieldOfView;
+  readonly attribute VRFieldOfView maximumFieldOfView;
+  readonly attribute VRFieldOfView recommendedFieldOfView;
+  readonly attribute DOMPoint eyeTranslation;
+
+  /* These values will vary after a FOV has been set */
+  readonly attribute VRFieldOfView currentFieldOfView;
+  readonly attribute DOMRect renderRect;
+};