Change upgrade menu icon to use circle instead of round-rect & ensure the arrow is white

chrome/browser/upgrade_detector.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/upgrade_detector.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
@@ skipping 41 matching lines @@
       break;
     case UPGRADE_ANNOYANCE_HIGH:
     case UPGRADE_ANNOYANCE_SEVERE:
     case UPGRADE_ANNOYANCE_CRITICAL:
       color = gfx::kGoogleRed700;
       break;
   }
   DCHECK_NE(gfx::kPlaceholderColor, color);
 
   return gfx::Image(
-      gfx::CreateVectorIcon(gfx::VectorIconId::UPGRADE_MENU_ITEM, 16, color));
+      gfx::CreateVectorIcon(gfx::VectorIconId::BROWSER_TOOLS_UPDATE, color));
 }
 
 UpgradeDetector::UpgradeDetector()
     : upgrade_available_(UPGRADE_AVAILABLE_NONE),
       best_effort_experiment_updates_available_(false),
       critical_experiment_updates_available_(false),
       critical_update_acknowledged_(false),
       is_factory_reset_required_(false),
       upgrade_notification_stage_(UPGRADE_ANNOYANCE_NONE),
       notify_upgrade_(false) {
@@ skipping 60 matching lines @@
       break;
     case ui::IDLE_STATE_ACTIVE:
     case ui::IDLE_STATE_UNKNOWN:
       break;
     default:
       NOTREACHED();  // Need to add any new value above (either providing
                      // automatic restart or show notification to user).
       break;
   }
 }