[Extensions] Fix bookmark drag-and-drop bug

chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.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_API_BOOKMARK_MANAGER_PRIVATE_BOOKMARK_MANAGER_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_BOOKMARK_MANAGER_PRIVATE_BOOKMARK_MANAGER_PRIVATE_API_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 84 matching lines @@
 // events. This class has one instance per bookmark manager tab.
 class BookmarkManagerPrivateDragEventRouter
     : public BookmarkTabHelper::BookmarkDrag,
       public content::WebContentsUserData<
           BookmarkManagerPrivateDragEventRouter> {
  public:
   explicit BookmarkManagerPrivateDragEventRouter(
       content::WebContents* web_contents);
   ~BookmarkManagerPrivateDragEventRouter() override;
 
-  static void MaybeCreateForWebContents(content::WebContents* web_contents);
-
   // BookmarkTabHelper::BookmarkDrag interface
   void OnDragEnter(const bookmarks::BookmarkNodeData& data) override;
   void OnDragOver(const bookmarks::BookmarkNodeData& data) override;
   void OnDragLeave(const bookmarks::BookmarkNodeData& data) override;
   void OnDrop(const bookmarks::BookmarkNodeData& data) override;
 
   // The bookmark drag and drop data. This gets set after a drop was done on
   // the page. This returns NULL if no data is available.
   const bookmarks::BookmarkNodeData* GetBookmarkNodeData();
 
@@ skipping 289 matching lines @@
  protected:
   ~BookmarkManagerPrivateGetRedoInfoFunction() override {}
 
   // ExtensionFunction:
   bool RunOnReady() override;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_BOOKMARK_MANAGER_PRIVATE_BOOKMARK_MANAGER_PRIVATE_API_H_