Switch SupportsUserData uses to use unique_ptr.

chrome/browser/android/bookmarks/partner_bookmarks_shim.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_ANDROID_BOOKMARKS_PARTNER_BOOKMARKS_SHIM_H_
 #define CHROME_BROWSER_ANDROID_BOOKMARKS_PARTNER_BOOKMARKS_SHIM_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 15 matching lines @@
 class PrefRegistrySyncable;
 }
 
 // A shim that lives on top of a BookmarkModel that allows the injection of
 // partner bookmarks without submitting changes to the bookmark model.
 // The shim persists bookmark renames/deletions in a user profile and could be
 // queried via shim->GetTitle(node) and shim->IsReachable(node).
 // Note that node->GetTitle() returns an original (unmodified) title.
 class PartnerBookmarksShim : public base::SupportsUserData::Data {
  public:
+  ~PartnerBookmarksShim() override;
+
   // Returns an instance of the shim for a given |browser_context|.
   static PartnerBookmarksShim* BuildForBrowserContext(
       content::BrowserContext* browser_context);
 
   // Registers preferences.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   // Disables the editing and stops any edits from being applied.
   // The user will start to see the original (unedited) partner bookmarks.
   // Edits are stored in the user profile, so once the editing is enabled
@@ skipping 73 matching lines @@
       content::BrowserContext* browser_context);
 
   // For testing: clears partner bookmark model data.
   static void ClearPartnerModelForTesting();
 
   // For testing: re-enables partner bookmarks editing.
   static void EnablePartnerBookmarksEditing();
 
  private:
   explicit PartnerBookmarksShim(PrefService* prefs);
-  ~PartnerBookmarksShim() override;
 
   const bookmarks::BookmarkNode* GetNodeByID(
       const bookmarks::BookmarkNode* parent,
       int64_t id) const;
   void ReloadNodeMapping();
   void SaveNodeMapping();
 
   std::unique_ptr<bookmarks::BookmarkNode> partner_bookmarks_root_;
   PrefService* prefs_;
   NodeRenamingMap node_rename_remove_map_;
 
   // The observers.
   base::ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(PartnerBookmarksShim);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_BOOKMARKS_PARTNER_BOOKMARKS_SHIM_H_