Separate GeolocationWatchers from Geolocation

Source/modules/geolocation/GeoNotifier.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 GeoNotifier_h
 #define GeoNotifier_h
 
+#include "modules/geolocation/PositionCallback.h"
+#include "modules/geolocation/PositionErrorCallback.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class Geolocation;
 class Geoposition;
-class PositionCallback;
 class PositionError;
-class PositionErrorCallback;
 class PositionOptions;
 
 class GeoNotifier : public GarbageCollectedFinalized<GeoNotifier> {
 public:
     static GeoNotifier* create(Geolocation* geolocation, PassOwnPtr<PositionCallback> positionCallback, PassOwnPtr<PositionErrorCallback> positionErrorCallback, PositionOptions* options)
     {
         return new GeoNotifier(geolocation, positionCallback, positionErrorCallback, options);
     }
     void trace(Visitor*);
 
@@ skipping 28 matching lines @@
     OwnPtr<PositionErrorCallback> m_errorCallback;
     Member<PositionOptions> m_options;
     Timer<GeoNotifier> m_timer;
     Member<PositionError> m_fatalError;
     bool m_useCachedPosition;
 };
 
 } // namespace blink
 
 #endif // GeoNotifier_h