Remove a couple desktop infobar png assets.

chrome/browser/extensions/theme_installed_infobar_delegate.h

 // Copyright (c) 2011 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 <string>
 
 #include "base/compiler_specific.h"
@@ skipping 26 matching lines @@
   ThemeInstalledInfoBarDelegate(ExtensionService* extension_service,
                                 ThemeService* theme_service,
                                 const extensions::Extension* new_theme,
                                 const std::string& previous_theme_id,
                                 bool previous_using_system_theme);
   ~ThemeInstalledInfoBarDelegate() override;
 
   // ConfirmInfoBarDelegate:
   Type GetInfoBarType() const override;
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
-  int GetIconId() const override;
   gfx::VectorIconId GetVectorIconId() const override;
   ThemeInstalledInfoBarDelegate* AsThemePreviewInfobarDelegate() override;
   base::string16 GetMessageText() const override;
   int GetButtons() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Cancel() override;
 
   // content::NotificationObserver:
   void Observe(int type,
                const content::NotificationSource& source,
@@ skipping 10 matching lines @@
 
   // Used to undo theme install.
   std::string previous_theme_id_;
   bool previous_using_system_theme_;
 
   // Registers and unregisters us for notifications.
   content::NotificationRegistrar registrar_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_THEME_INSTALLED_INFOBAR_DELEGATE_H_