Use GURLs in Physical Web data source

components/physical_web/data_source/physical_web_data_source_impl.h

Index: components/physical_web/data_source/physical_web_data_source_impl.h
diff --git a/components/physical_web/data_source/physical_web_data_source_impl.h b/components/physical_web/data_source/physical_web_data_source_impl.h
index 3f411834c03ee6a386225b856d782da643ce4309..2df325a289b149bcb29f13956825b3ee4c91a573 100644
--- a/components/physical_web/data_source/physical_web_data_source_impl.h
+++ b/components/physical_web/data_source/physical_web_data_source_impl.h
@@ -6,6 +6,7 @@
 
 #include "base/observer_list.h"
 #include "components/physical_web/data_source/physical_web_data_source.h"
+#include "url/gurl.h"
 
 namespace physical_web {
 
@@ -23,13 +24,13 @@ class PhysicalWebDataSourceImpl : public PhysicalWebDataSource {
   void UnregisterListener(PhysicalWebListener* physical_web_listener) override;
 
   // Notify all registered listeners that a URL has been found.
-  void NotifyOnFound(const std::string& url);
+  void NotifyOnFound(const GURL& url);
 
   // Notify all registered listeners that a URL has been lost.
-  void NotifyOnLost(const std::string& url);
+  void NotifyOnLost(const GURL& url);
 
   // Notify all registered listeners that a distance has changed for a URL.
-  void NotifyOnDistanceChanged(const std::string& url,
+  void NotifyOnDistanceChanged(const GURL& url,
                                double distance_estimate);
 
  private: