Move around more vector icons.

ios/chrome/browser/ui/toolbar/toolbar_model_delegate_ios.mm

 // Copyright 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.
 
 #import "ios/chrome/browser/ui/toolbar/toolbar_model_delegate_ios.h"
 
 #include "base/logging.h"
 #include "components/omnibox/browser/autocomplete_classifier.h"
 #include "components/omnibox/browser/autocomplete_input.h"
 #include "components/omnibox/browser/autocomplete_match.h"
@@ skipping 89 matching lines @@
   // initialization), so nothing can fail.
   if (!web_state)
     return NO;
   auto* client = IOSSecurityStateTabHelper::FromWebState(web_state);
   security_state::SecurityInfo result;
   client->GetSecurityInfo(&result);
   return result.malicious_content_status !=
          security_state::MALICIOUS_CONTENT_STATUS_NONE;
 }
 
-gfx::VectorIconId ToolbarModelDelegateIOS::GetVectorIconOverride() const {
-  return gfx::VectorIconId::VECTOR_ICON_NONE;
+const gfx::VectorIcon* ToolbarModelDelegateIOS::GetVectorIconOverride() const {
+  return nullptr;
 }