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

Source/modules/geolocation/CircularRegion.cpp

-// 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.
-
-#include "config.h"
-#include "modules/geolocation/CircularRegion.h"
-
-#include "bindings/core/v8/Dictionary.h"
-
-namespace blink {
-
-CircularRegionInit::CircularRegionInit(const Dictionary& init)
-    : latitude(0)
-    , longitude(0)
-    , radius(0)
-{
-    DictionaryHelper::get(init, "id", id);
-    DictionaryHelper::get(init, "latitude", latitude);
-    DictionaryHelper::get(init, "longitude", longitude);
-    DictionaryHelper::get(init, "radius", radius);
-}
-
-CircularRegion* CircularRegion::create(const Dictionary& init)
-{
-    return new CircularRegion(CircularRegionInit(init));
-}
-
-CircularRegion::CircularRegion(const CircularRegionInit& init)
-    : GeofencingRegion(init.id)
-    , m_latitude(init.latitude)
-    , m_longitude(init.longitude)
-    , m_radius(init.radius)
-{
-    ScriptWrappable::init(this);
-}
-
-} // namespace blink