Basic implementation of GeofencingManager class.

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 "base/callback_forward.h"
+#include "content/common/geofencing_status.h"
+
+namespace blink {
+struct WebCircularGeofencingRegion;
+};
+
+namespace content {
+
+class GeofencingProvider {
+ public:
+  // Callback that gets called on completion of registering a new region. The
+  // status indicates success or failure, and in case of success, an id to use
+  // to later unregister the region is passed as |registration_id|. If
+  // registration failed, providers should set |registration_id| to -1.
+  typedef base::Callback<void(GeofencingStatus, int registration_id)>
+      RegisterCallback;
+
+  virtual ~GeofencingProvider() {}
+
+  // Called by |GeofencingManager| to register a new fence. GeofencingManager is
+  // responsible for handling things like duplicate regions, so platform
+  // specific implementations shouldn't have to worry about things like that.
+  // Also GeofencingManager 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.
+  virtual void RegisterRegion(const blink::WebCircularGeofencingRegion& region,
+                              const RegisterCallback& callback) = 0;
+
+  // Called by |GeofencingManager| to unregister an existing registration. Will
+  // only be called once for each registration.
+  virtual void UnregisterRegion(int registration_id) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_GEOFENCING_GEOFENCING_PROVIDER_H_