Attempt at fixing crash during importing. As far as I can tell from...

chrome/browser/importer/importer.h

 // Copyright (c) 2006-2008 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_
 
 #include <string>
 #include <vector>
 
@@ skipping 164 matching lines @@
   virtual void BookmarkNodeRemoved(BookmarkModel* model,
                                    const BookmarkNode* parent,
                                    int old_index,
                                    const BookmarkNode* node) {}
   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 method. Called when TemplateURLModel has been loaded.
   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();
 
@@ skipping 78 matching lines @@
   }
 
 
  private:
   // If we're not waiting on any model to finish loading, invokes the task_.
   void InvokeTaskIfDone();
 
   NotificationRegistrar registrar_;
   ImporterList importer_list_;
 
+  // Profile we're importing from.
+  Profile* profile_;
+
   Observer* observer_;
   scoped_refptr<ProfileWriter> writer_;
 
   // The task is the process of importing settings from other browsers.
   Task* task_;
 
   // The importer used in the task;
   Importer* importer_;
 
   // The message loop for reading the source profiles.
   MessageLoop* file_loop_;
 
   // True if we're waiting for the model to finish loading.
   bool waiting_for_bookmarkbar_model_;
 
+  // Have we installed a listener on the bookmark model?
+  bool installed_bookmark_observer_;
+
   // True if source profile is readable.
   bool is_source_readable_;
 
   // True if UI is not to be shown.
   bool headless_;
 
   // Parent Window to use when showing any modal dialog boxes.
   gfx::NativeWindow parent_window_;
 
   // Firefox profile lock.
@@ skipping 68 matching lines @@
 // first run UI.
 void StartImportingWithUI(gfx::NativeWindow parent_window,
                           int16 items,
                           ImporterHost* coordinator,
                           const ProfileInfo& source_profile,
                           Profile* target_profile,
                           ImportObserver* observer,
                           bool first_run);
 
 #endif  // CHROME_BROWSER_IMPORTER_IMPORTER_H_