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

Source/modules/geolocation/CircularRegion.idl

Index: Source/modules/geolocation/CircularRegion.idl
diff --git a/Source/modules/geolocation/CircularRegion.idl b/Source/modules/geolocation/CircularRegion.idl
deleted file mode 100644
index c4121e13ed840cfbc941438b75321cb870dce747..0000000000000000000000000000000000000000
--- a/Source/modules/geolocation/CircularRegion.idl
+++ /dev/null
@@ -1,17 +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,
-    Exposed=Window&Worker,
-    GarbageCollected,
-    Constructor(Dictionary init)
-] interface CircularRegion : GeofencingRegion {
-    const double MIN_RADIUS = 1.0;
-    const double MAX_RADIUS = 100.0;
-
-    readonly attribute double latitude;
-    readonly attribute double longitude;
-    readonly attribute double radius;
-};