Adding WebVR interface to Blink

Source/modules/vr/VRFieldOfView.idl

Index: Source/modules/vr/VRFieldOfView.idl
diff --git a/Source/modules/vr/VRFieldOfView.idl b/Source/modules/vr/VRFieldOfView.idl
new file mode 100644
index 0000000000000000000000000000000000000000..701961dfedbd5dbc3e536b06cfb18b3bede10de4
--- /dev/null
+++ b/Source/modules/vr/VRFieldOfView.idl
@@ -0,0 +1,17 @@
+// 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.
+
+// http://mozvr.github.io/webvr-spec/webvr.html#vrfieldofview
+[
+    RuntimeEnabled=VRDevice,
+    GarbageCollected,
+    TypeChecking=Interface,
+    Constructor(optional VRFieldOfViewInit fov),
+] interface VRFieldOfView {
+    attribute double upDegrees;
+    attribute double downDegrees;
+    attribute double leftDegrees;
+    attribute double rightDegrees;
+};
+