Move all geofencing code into its own module separate from geolocation.

Source/modules/geolocation/GeofencingRegion.idl

Index: Source/modules/geolocation/GeofencingRegion.idl
diff --git a/Source/modules/geolocation/GeofencingRegion.idl b/Source/modules/geolocation/GeofencingRegion.idl
deleted file mode 100644
index 4e22058d98b22fb2f0a7d196263ea4b9a458feab..0000000000000000000000000000000000000000
--- a/Source/modules/geolocation/GeofencingRegion.idl
+++ /dev/null
@@ -1,11 +0,0 @@
-// 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=Geofencing,
-    NoInterfaceObject,
-    GarbageCollected,
-] interface GeofencingRegion {
-    readonly attribute DOMString id;
-};