Remove last vestigial uses of "update needed" png assets.

chrome/browser/ui/views/outdated_upgrade_bubble_view.h

 // Copyright (c) 2013 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_UI_VIEWS_OUTDATED_UPGRADE_BUBBLE_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_OUTDATED_UPGRADE_BUBBLE_VIEW_H_
 
 #include "base/macros.h"
 #include "ui/views/bubble/bubble_dialog_delegate.h"
 
@@ skipping 13 matching lines @@
                          content::PageNavigator* navigator,
                          bool auto_update_enabled);
 
   // Identifies if we are running a build that supports the
   // outdated upgrade bubble view.
   static bool IsAvailable();
 
   // views::BubbleDialogDelegateView methods.
   void WindowClosing() override;
   base::string16 GetWindowTitle() const override;
-  gfx::ImageSkia GetWindowIcon() override;
-  bool ShouldShowWindowIcon() const override;
   bool Cancel() override;
   bool Accept() override;
   void UpdateButton(views::LabelButton* button, ui::DialogButton type) override;
   base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
   void Init() override;
 
  private:
   OutdatedUpgradeBubbleView(views::View* anchor_view,
                             content::PageNavigator* navigator,
                             bool auto_update_enabled);
   ~OutdatedUpgradeBubbleView() override;
 
   // Identifies if auto-update is enabled or not.
   bool auto_update_enabled_;
 
   // The PageNavigator to use for opening the Download Chrome URL.
   content::PageNavigator* navigator_;
 
   std::unique_ptr<ElevationIconSetter> elevation_icon_setter_;
 
   DISALLOW_COPY_AND_ASSIGN(OutdatedUpgradeBubbleView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_OUTDATED_UPGRADE_BUBBLE_VIEW_H_