Select and close previous theme info bars when resetting to default theme via...

chrome/browser/extensions/theme_installed_infobar_delegate.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_EXTENSIONS_THEME_INSTALLED_INFOBAR_DELEGATE_H_
 #define CHROME_BROWSER_EXTENSIONS_THEME_INSTALLED_INFOBAR_DELEGATE_H_
 
 #include "chrome/browser/tab_contents/infobar_delegate.h"
+#include "chrome/common/notification_registrar.h"
 
 class Extension;
 class SkBitmap;
 class TabContents;
 
 // When a user installs a theme, we display it immediately, but provide an
 // infobar allowing them to cancel.
-class ThemeInstalledInfoBarDelegate : public ConfirmInfoBarDelegate {
+class ThemeInstalledInfoBarDelegate : public ConfirmInfoBarDelegate,
+                                      public NotificationObserver {
  public:
   ThemeInstalledInfoBarDelegate(TabContents* tab_contents,
                                 const Extension* new_theme,
                                 const std::string& previous_theme_id);
   virtual ~ThemeInstalledInfoBarDelegate();
   virtual void InfoBarClosed();
   virtual std::wstring GetMessageText() const;
   virtual SkBitmap* GetIcon() const;
   virtual ThemeInstalledInfoBarDelegate* AsThemePreviewInfobarDelegate();
   virtual int GetButtons() const;
   virtual std::wstring GetButtonLabel(
       ConfirmInfoBarDelegate::InfoBarButton button) const;
   virtual bool Cancel();
 
+  // NotificationObserver implementation.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
  protected:
   Profile* profile() { return profile_; }
 
  private:
   Profile* profile_;
+
   // Name of theme that's just been installed.
   std::string name_;
+
+  // ID of theme that's just been installed.
+  std::string theme_id_;
+
   // Used to undo theme install.
   std::string previous_theme_id_;
+
+  // Tab to which this info bar is associated.
+  TabContents* tab_contents_;
+
+  // Registers and unregisters us for notifications.
+  NotificationRegistrar registrar_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_THEME_INSTALLED_INFOBAR_DELEGATE_H_