Remove unused linked_ptr inclusion

chrome/browser/safe_browsing/client_side_model_loader.h

 // Copyright (c) 2012 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.
 //
 // Helper class loads models for client-side phishing detection
 // from the the SafeBrowsing backends.
 //
 // This class is not thread-safe and expects all calls to be made on the UI
 // thread.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_CLIENT_SIDE_MODEL_LOADER_H_
 #define CHROME_BROWSER_SAFE_BROWSING_CLIENT_SIDE_MODEL_LOADER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "url/gurl.h"
 
 namespace base {
 class TimeDelta;
 }
 
@@ skipping 100 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(ModelLoaderTest, RescheduleFetchTest);
   FRIEND_TEST_ALL_PREFIXES(ModelLoaderTest, UpdateRenderersTest);
   FRIEND_TEST_ALL_PREFIXES(ClientSideDetectionServiceTest,
                            SetEnabledAndRefreshState);
   DISALLOW_COPY_AND_ASSIGN(ModelLoader);
 };
 
 }  // namespace safe_browsing
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_CLIENT_SIDE_MODEL_LOADER_H_