Remove the (broken and unneeded) 'force_update' option from ServiceWatcher::DiscoverNewDevices.

chrome/browser/local_discovery/service_discovery_client_mac.h

 // Copyright 2013 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 CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_CLIENT_MAC_H_
 #define CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_CLIENT_MAC_H_
 
 #import <Foundation/Foundation.h>
+#include <memory>
 #include <string>
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/local_discovery/service_discovery_shared_client.h"
 #include "content/public/browser/browser_thread.h"
 
@@ skipping 81 matching lines @@
       const ServiceWatcher::UpdatedCallback& callback,
       scoped_refptr<base::SingleThreadTaskRunner> service_discovery_runner);
 
   void OnServicesUpdate(ServiceWatcher::UpdateType update,
                         const std::string& service);
 
  private:
   ~ServiceWatcherImplMac() override;
 
   void Start() override;
-  void DiscoverNewServices(bool force_update) override;
+  void DiscoverNewServices() override;
   void SetActivelyRefreshServices(bool actively_refresh_services) override;
   std::string GetServiceType() const override;
 
   std::string service_type_;
   ServiceWatcher::UpdatedCallback callback_;
   bool started_;
 
   std::unique_ptr<NetServiceBrowserContainer,
                   ServiceDiscoveryThreadDeleter<NetServiceBrowserContainer>>
       container_;
@@ skipping 66 matching lines @@
                   ServiceDiscoveryThreadDeleter<NetServiceContainer>>
       container_;
   base::WeakPtrFactory<ServiceResolverImplMac> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceResolverImplMac);
 };
 
 }  // namespace local_discovery
 
 #endif  // CHROME_BROWSER_LOCAL_DISCOVERY_SERVICE_DISCOVERY_CLIENT_MAC_H_