Remove some linked_ptr c/b/extension

chrome/browser/extensions/location_bar_controller.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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_LOCATION_BAR_CONTROLLER_H_
 #define CHROME_BROWSER_EXTENSIONS_LOCATION_BAR_CONTROLLER_H_
 
 #include <map>
+#include <memory>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/scoped_observer.h"
 #include "extensions/browser/extension_registry_observer.h"
 
 class ExtensionAction;
 
 namespace content {
 class WebContents;
 class BrowserContext;
 }
 
@@ skipping 28 matching lines @@
 
   // The ExtensionActionManager to provide page actions.
   ExtensionActionManager* action_manager_;
 
   // Whether or not to show page actions in the location bar at all. (This is
   // false with the toolbar redesign enabled.)
   bool should_show_page_actions_;
 
   // Manufactured page actions that have been generated for extensions that want
   // to run a script, but were blocked.
-  typedef std::map<std::string, linked_ptr<ExtensionAction> >
-      ExtensionActionMap;
+  using ExtensionActionMap =
+      std::map<std::string, std::unique_ptr<ExtensionAction>>;
   ExtensionActionMap active_script_actions_;
 
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarController);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_LOCATION_BAR_CONTROLLER_H_