bookmarks: Use On*Clicked for naming an event method.

chrome/browser/ui/bookmarks/bookmark_bar_instructions_delegate.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_UI_BOOKMARKS_BOOKMARK_BAR_INSTRUCTIONS_DELEGATE_H_
 #define CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_BAR_INSTRUCTIONS_DELEGATE_H_
 
 // The delegate is notified once the user clicks on the link to import
 // bookmarks.
 class BookmarkBarInstructionsDelegate {
  public:
-  virtual void ShowImportDialog() = 0;
+  virtual void OnImportBookmarks() = 0;
 
  protected:
   virtual ~BookmarkBarInstructionsDelegate() {}
 };
 
 #endif  // CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_BAR_INSTRUCTIONS_DELEGATE_H_