Remove some linked_ptr c/b/extension

chrome/browser/extensions/api/gcd_private/gcd_private_api.cc

 // Copyright 2014 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 "chrome/browser/extensions/api/gcd_private/gcd_private_api.h"
 
+#include <memory>
+
 #include "base/lazy_instance.h"
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/extensions/api/gcd_private/privet_v3_context_getter.h"
 #include "chrome/browser/extensions/api/gcd_private/privet_v3_session.h"
 #include "chrome/browser/local_discovery/endpoint_resolver.h"
 #include "chrome/browser/local_discovery/service_discovery_shared_client.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/storage_partition.h"
 #include "net/url_request/url_request_context_getter.h"
 
@@ skipping 66 matching lines @@
                            const MessageResponseCallback& callback);
 
   void OnServiceResolved(int session_id,
                          const CreateSessionCallback& callback,
                          const net::IPEndPoint& endpoint);
 
   scoped_refptr<local_discovery::ServiceDiscoverySharedClient>
       service_discovery_client_;
 
   struct SessionInfo {
-    linked_ptr<PrivetV3Session> session;
-    linked_ptr<local_discovery::EndpointResolver> resolver;
+    std::unique_ptr<PrivetV3Session> session;
+    std::unique_ptr<local_discovery::EndpointResolver> resolver;
   };
 
   std::map<int, SessionInfo> sessions_;
   int last_session_id_ = 0;
 
   content::BrowserContext* const browser_context_;
 
   scoped_refptr<PrivetV3ContextGetter> context_getter_;
 
   base::WeakPtrFactory<GcdPrivateAPIImpl> weak_ptr_factory_{this};
@@ skipping 329 matching lines @@
 
   GcdPrivateAPIImpl* gcd_api = GcdPrivateAPIImpl::Get(GetProfile());
 
   gcd_api->RemoveSession(params->session_id);
 
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions