Get rid of BookmarkEditor::Show()'s BookmarkEditor::Handler argument.

chrome/browser/bookmarks/bookmark_editor.h

 // Copyright (c) 2009 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_BOOKMARKS_BOOKMARK_EDITOR_H_
 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_EDITOR_H_
 
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 57 matching lines @@
     std::vector<std::pair<GURL, std::wstring> > urls;
   };
 
   // Shows the bookmark editor. The bookmark editor allows editing an
   // existing node or creating a new bookmark node (as determined by
   // |details.type|). If |configuration| is SHOW_TREE, a tree is shown allowing
   // the user to choose the parent of the node.
   // |parent| gives the initial parent to select in the tree for the node.
   // |parent| is only used if |details.existing_node| is null.
   // BookmarkEditor takes ownership of |handler| and deletes it when done.
-  // |handler| may be null. See description of Handler for details.
   static void Show(gfx::NativeWindow parent_window,
                    Profile* profile,
                    const BookmarkNode* parent,
                    const EditDetails& details,
-                   Configuration configuration,
-                   Handler* handler);
+                   Configuration configuration);
 };
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_EDITOR_H_