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..b79d70d9661f9fcd2e96f6d34bc6f21b9b3dc5dd
--- /dev/null
+++ b/Source/modules/vr/VRFieldOfView.idl
@@ -0,0 +1,15 @@
+// Copyright 2014 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,
+    Constructor(optional VRFieldOfViewInit fov),

[philipj_slow, 2015/02/23 02:33:10]

Now you may need TypeChecking=Interface so that null cannot be passed to the
constructor. Not entirely sure.

+] interface VRFieldOfView {
+    attribute double upDegrees;
+    attribute double downDegrees;
+    attribute double leftDegrees;
+    attribute double rightDegrees;
+};
+