Delete geofencing implementation.

content/browser/geofencing/geofencing_provider.h

-// 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.
-
-#ifndef CONTENT_BROWSER_GEOFENCING_GEOFENCING_PROVIDER_H_
-#define CONTENT_BROWSER_GEOFENCING_GEOFENCING_PROVIDER_H_
-
-#include <stdint.h>
-
-#include "base/callback_forward.h"
-#include "content/common/geofencing_types.h"
-
-namespace blink {
-struct WebCircularGeofencingRegion;
-};
-
-namespace content {
-
-class GeofencingProvider {
- public:
-  typedef base::Callback<void(GeofencingStatus)> StatusCallback;
-
-  virtual ~GeofencingProvider() {}
-
-  // Called by |GeofencingService| to register a new fence. GeofencingService is
-  // responsible for handling things like duplicate regions, so platform
-  // specific implementations shouldn't have to worry about things like that.
-  // Also GeofencingService should be making sure the total number of geofences
-  // that is registered with the platform specific provider does not exceed the
-  // number of regions supported by the platform, although that isn't
-  // implemented yet.
-  // Implementations of RegisterRegion must asynchronously call the |callback|
-  // to indicate success or failure.
-  virtual void RegisterRegion(int64_t geofencing_registration_id,
-                              const blink::WebCircularGeofencingRegion& region,
-                              const StatusCallback& callback) = 0;
-
-  // Called by |GeofencingService| to unregister an existing registration. Will
-  // only be called once for each registration.
-  virtual void UnregisterRegion(int64_t geofencing_registration_id) = 0;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_GEOFENCING_GEOFENCING_PROVIDER_H_