Use GURLs in Physical Web data source

components/physical_web/data_source/fake_physical_web_data_source.cc

 // Copyright 2016 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.
 
 #include "components/physical_web/data_source/fake_physical_web_data_source.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "components/physical_web/data_source/physical_web_listener.h"
 
@@ skipping 73 matching lines @@
 void FakePhysicalWebDataSource::UnregisterListener(
     PhysicalWebListener* physical_web_listener) {
   observer_list_.RemoveObserver(physical_web_listener);
 }
 
 void FakePhysicalWebDataSource::SetMetadata(
     std::unique_ptr<ListValue> metadata) {
   metadata_ = std::move(metadata);
 }
 
-void FakePhysicalWebDataSource::NotifyOnFound(const std::string& url) {
+void FakePhysicalWebDataSource::NotifyOnFound(const GURL& url) {
   for (PhysicalWebListener& observer : observer_list_)
     observer.OnFound(url);
 }
 
-void FakePhysicalWebDataSource::NotifyOnLost(const std::string& url) {
+void FakePhysicalWebDataSource::NotifyOnLost(const GURL& url) {
   for (PhysicalWebListener& observer : observer_list_)
     observer.OnLost(url);
 }
 
 void FakePhysicalWebDataSource::NotifyOnDistanceChanged(
-    const std::string& url,
+    const GURL& url,
     double distance_estimate) {
   for (PhysicalWebListener& observer : observer_list_)
     observer.OnDistanceChanged(url, distance_estimate);
 }
 
 }  // namespace physical_web