Hooks together Geolocation Feature in the Client and Engine.

device/geolocation/location_provider.h

 // Copyright (c) 2013 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 DEVICE_GEOLOCATION_LOCATION_PROVIDER_H_
 #define DEVICE_GEOLOCATION_LOCATION_PROVIDER_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "device/geolocation/geoposition.h"
 
 namespace device {
 
-class LocationProvider;
-
 // The interface for providing location information.
 class DEVICE_GEOLOCATION_EXPORT LocationProvider {
  public:
   virtual ~LocationProvider() {}
 
   typedef base::Callback<void(const LocationProvider*, const Geoposition&)>
       LocationProviderUpdateCallback;
 
   // This callback will be used to notify when a new Geoposition becomes
   // available.
@@ skipping 19 matching lines @@
   // Called everytime permission is granted to a page for using geolocation.
   // This may either be through explicit user action (e.g. responding to the
   // infobar prompt) or inferred from a persisted site permission.
   // Note: See |StartProvider()| for more information.
   virtual void OnPermissionGranted() = 0;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_GEOLOCATION_LOCATION_PROVIDER_H_