Pass implementation object to supplemental classes by reference

Source/modules/geolocation/GeolocationController.h

Index: Source/modules/geolocation/GeolocationController.h
diff --git a/Source/modules/geolocation/GeolocationController.h b/Source/modules/geolocation/GeolocationController.h
index d1c90812dde1db2fb79dbe31e0cf02c7dc8c6331..744880d7bff085ccbc9a640ca05ec7b970a920fd 100644
--- a/Source/modules/geolocation/GeolocationController.h
+++ b/Source/modules/geolocation/GeolocationController.h
@@ -47,7 +47,7 @@ class GeolocationController FINAL : public Supplement<Page>, public PageLifecycl
 public:
     virtual ~GeolocationController();
 
-    static PassOwnPtr<GeolocationController> create(Page*, GeolocationClient*);
+    static PassOwnPtr<GeolocationController> create(Page&, GeolocationClient*);
 
     void addObserver(Geolocation*, bool enableHighAccuracy);
     void removeObserver(Geolocation*);
@@ -71,7 +71,7 @@ public:
     static GeolocationController* from(Page* page) { return static_cast<GeolocationController*>(Supplement<Page>::from(page, supplementName())); }
 
 private:
-    GeolocationController(Page*, GeolocationClient*);
+    GeolocationController(Page&, GeolocationClient*);
 
     void startUpdatingIfNeeded();
     void stopUpdatingIfNeeded();