Update upgrade app menu icons for MD/vectorization.

chrome/browser/upgrade_detector.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_UPGRADE_DETECTOR_H_
 #define CHROME_BROWSER_UPGRADE_DETECTOR_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/timer/timer.h"
@@ skipping 52 matching lines @@
     critical_update_acknowledged_ = true;
   }
 
   // Whether the user has acknowledged the critical update.
   bool critical_update_acknowledged() const {
     return critical_update_acknowledged_;
   }
 
   bool is_factory_reset_required() const { return is_factory_reset_required_; }
 
-  // Retrieves the right icon ID based on the degree of severity (see
+  // Retrieves the right icon based on the degree of severity (see
   // UpgradeNotificationAnnoyanceLevel, each level has an an accompanying icon
   // to go with it) to display within the app menu.
-  int GetIconResourceID();
+  gfx::Image GetIcon();
 
   UpgradeNotificationAnnoyanceLevel upgrade_notification_stage() const {
     return upgrade_notification_stage_;
   }
 
  protected:
   enum UpgradeAvailable {
     // If no update is available and current install is recent enough.
     UPGRADE_AVAILABLE_NONE,
     // If a regular update is available.
@@ skipping 84 matching lines @@
   UpgradeNotificationAnnoyanceLevel upgrade_notification_stage_;
 
   // Whether we have waited long enough after detecting an upgrade (to see
   // is we should start nagging about upgrading).
   bool notify_upgrade_;
 
   DISALLOW_COPY_AND_ASSIGN(UpgradeDetector);
 };
 
 #endif  // CHROME_BROWSER_UPGRADE_DETECTOR_H_