Add the "virtual" keyword on method overrides that are missing it.

chrome/browser/importer/importer.h

 // Copyright (c) 2010 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_IMPORTER_IMPORTER_H_
 #define CHROME_BROWSER_IMPORTER_IMPORTER_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 91 matching lines @@
   virtual void BookmarkNodeChanged(BookmarkModel* model,
                                    const BookmarkNode* node) {}
   virtual void BookmarkNodeChildrenReordered(BookmarkModel* model,
                                              const BookmarkNode* node) {}
   virtual void BookmarkNodeFavIconLoaded(BookmarkModel* model,
                                          const BookmarkNode* node) {}
   virtual void BookmarkModelBeingDeleted(BookmarkModel* model);
 
   // NotificationObserver implementation. Called when TemplateURLModel has been
   // loaded.
-  void Observe(NotificationType type,
-               const NotificationSource& source,
-               const NotificationDetails& details);
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
 
   // ShowWarningDialog() asks user to close the application that is owning the
   // lock. They can retry or skip the importing process.
   void ShowWarningDialog();
 
   // OnLockViewEnd() is called when user end the dialog by clicking a push
   // button. |is_continue| is true when user clicked the "Continue" button.
   void OnLockViewEnd(bool is_continue);
 
   // Starts the process of importing the settings and data depending on what
@@ skipping 407 matching lines @@
 // first run UI.
 void StartImportingWithUI(gfx::NativeWindow parent_window,
                           uint16 items,
                           ImporterHost* coordinator,
                           const importer::ProfileInfo& source_profile,
                           Profile* target_profile,
                           ImportObserver* observer,
                           bool first_run);
 
 #endif  // CHROME_BROWSER_IMPORTER_IMPORTER_H_