Fix a crash in PasswordManagerExceptionsView

chrome/browser/views/password_manager_exceptions_view.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_PASSWORD_MANAGER_EXCEPTIONS_VIEW_H__
 #define CHROME_BROWSER_PASSWORD_MANAGER_EXCEPTIONS_VIEW_H__
 
 #include <vector>
 
 #include "base/scoped_ptr.h"
@@ skipping 20 matching lines @@
   // WebDataServiceConsumer implementation.
   virtual void OnWebDataServiceRequestDone(WebDataService::Handle h,
                                            const WDTypedResult* result);
   // Request all logins data.
   void GetAllExceptionsForProfile();
 };
 
 class PasswordManagerExceptionsView : public views::View,
                                       public views::DialogDelegate,
                                       public views::TableViewObserver,
-                                      public views::NativeButton::Listener {
+                                      public views::NativeButton::Listener,
+                                      public PasswordManagerTableModelObserver {
  public:
   explicit PasswordManagerExceptionsView(Profile* profile);
   virtual ~PasswordManagerExceptionsView();
 
   // Show the PasswordManagerExceptionsView for the given profile.
   static void Show(Profile* profile);
 
   // View methods.
   virtual void Layout();
   virtual gfx::Size GetPreferredSize();
   virtual void ViewHierarchyChanged(bool is_add, views::View* parent,
                                     views::View* child);
 
   // views::TableViewObserver implementation.
   virtual void OnSelectionChanged();
 
   // NativeButton::Listener implementation.
   virtual void ButtonPressed(views::NativeButton* sender);
 
   // views::DialogDelegate methods:
   virtual int GetDialogButtons() const;
   virtual bool CanResize() const { return true; }
   virtual bool CanMaximize() const { return false; }
   virtual bool IsAlwaysOnTop() const { return false; }
   virtual bool HasAlwaysOnTopMenu() const { return false; }
   virtual std::wstring GetWindowTitle() const;
   virtual void WindowClosing();
   virtual views::View* GetContentsView();
 
+  // PasswordManagerTableModelObserver implementation.
+  virtual void OnRowCountChanged(size_t rows);
+
  private:
   // Wire up buttons, the model, and the table view, and query the DB for
   // exception data tied to the given profile.
   void Init();
 
   // Helper to configure our buttons and labels.
   void SetupButtons();
 
   // Helper to configure our table view.
   void SetupTable();
 
   // Components in this view.
   PasswordManagerExceptionsTableModel table_model_;
   views::TableView* table_view_;
 
   // The buttons and labels.
   views::NativeButton remove_button_;
   views::NativeButton remove_all_button_;
 
+  static PasswordManagerExceptionsView* instance_;
+
   DISALLOW_EVIL_CONSTRUCTORS(PasswordManagerExceptionsView);
 };
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_EXCEPTIONS_VIEW_H__