Remove GetMetadata from PhysicalWebDataSource and PhysicalWebScanner

components/physical_web/data_source/fake_physical_web_data_source.h

 // 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.
 
 #ifndef COMPONENTS_PHYSICAL_WEB_DATA_SOURCE_FAKE_PHYSICAL_WEB_DATA_SOURCE_H_
 #define COMPONENTS_PHYSICAL_WEB_DATA_SOURCE_FAKE_PHYSICAL_WEB_DATA_SOURCE_H_
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "base/observer_list.h"
 #include "components/physical_web/data_source/physical_web_data_source.h"
 
 class GURL;
 
-namespace base {
-class ListValue;
-}
-
 namespace physical_web {
 
 std::unique_ptr<Metadata> CreatePhysicalWebPage(
     const std::string& resolved_url,
     double distance_estimate,
     const std::string& group_id,
     int scan_timestamp,
     const std::string& title,
     const std::string& description,
     const std::string& scanned_url);
 
 std::unique_ptr<Metadata>
 CreateDummyPhysicalWebPage(int id, double distance, int timestamp);
 
 std::unique_ptr<MetadataList> CreateDummyPhysicalWebPages(
     const std::vector<int>& ids);
 
 class FakePhysicalWebDataSource : public PhysicalWebDataSource {
  public:
   FakePhysicalWebDataSource();
   ~FakePhysicalWebDataSource() override;
 
   void StartDiscovery(bool network_request_enabled) override;
   void StopDiscovery() override;
 
-  std::unique_ptr<base::ListValue> GetMetadata() override;
   std::unique_ptr<MetadataList> GetMetadataList() override;
 
   bool HasUnresolvedDiscoveries() override;
 
   void RegisterListener(PhysicalWebListener* physical_web_listener) override;
   void UnregisterListener(PhysicalWebListener* physical_web_listener) override;
 
   // for testing
-  void SetMetadata(std::unique_ptr<base::ListValue> metadata);
   void SetMetadataList(std::unique_ptr<MetadataList> metadata_list);
   void NotifyOnFound(const GURL& url);
   void NotifyOnLost(const GURL& url);
   void NotifyOnDistanceChanged(const GURL& url, double distance_estimate);
 
  private:
-  std::unique_ptr<base::ListValue> metadata_;
   std::unique_ptr<MetadataList> metadata_list_;
   base::ObserverList<PhysicalWebListener> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(FakePhysicalWebDataSource);
 };
 
 }  // namespace physical_web
 
 #endif  // COMPONENTS_PHYSICAL_WEB_DATA_SOURCE_FAKE_PHYSICAL_WEB_DATA_SOURCE_H_