Some linked_ptr -> unique_ptr conversion in extensions/browser.

extensions/browser/extension_prefs.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_EXTENSION_PREFS_H_
 #define EXTENSIONS_BROWSER_EXTENSION_PREFS_H_
 
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/prefs/scoped_user_pref_update.h"
 #include "components/sync/api/string_ordinal.h"
 #include "extensions/browser/blacklist_state.h"
 #include "extensions/browser/extension_scoped_prefs.h"
 #include "extensions/browser/install_flag.h"
 #include "extensions/common/constants.h"
@@ skipping 27 matching lines @@
 //       meta-preferences describing properties of the extension like
 //       installation time, whether the extension is enabled, etc.
 // - extension controlled preferences:
 //       browser preferences that an extension controls. For example, an
 //       extension could use the proxy API to specify the browser's proxy
 //       preference. Extension-controlled preferences are stored in
 //       PrefValueStore::extension_prefs(), which this class populates and
 //       maintains as the underlying extensions change.
 class ExtensionPrefs : public ExtensionScopedPrefs, public KeyedService {
  public:
-  typedef std::vector<linked_ptr<ExtensionInfo> > ExtensionsInfo;
+  using ExtensionsInfo = std::vector<std::unique_ptr<ExtensionInfo>>;
 
   // Vector containing identifiers for preferences.
   typedef std::set<std::string> PrefKeySet;
 
   // This enum is used to store the reason an extension's install has been
   // delayed.  Do not remove items or re-order this enum as it is used in
   // preferences.
   enum DelayReason {
     DELAY_REASON_NONE = 0,
     DELAY_REASON_GC = 1,
@@ skipping 616 matching lines @@
   bool extensions_disabled_;
 
   base::ObserverList<ExtensionPrefsObserver> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionPrefs);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_PREFS_H_