Remove UserGestureUtilizedCallback, it's unused outside of tests

third_party/WebKit/Source/core/html/HTMLFormElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights
  * reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 436 matching lines @@
         .GetFrame()
         ->GetScriptController()
         .ExecuteScriptIfJavaScriptURL(submission->Action(), this);
     return;
   }
 
   Frame* target_frame = GetDocument().GetFrame()->FindFrameForNavigation(
       submission->Target(), *GetDocument().GetFrame());
   if (!target_frame) {
     if (!LocalDOMWindow::AllowPopUp(*GetDocument().GetFrame()) &&
-        !UserGestureIndicator::UtilizeUserGesture())
+        !UserGestureIndicator::ProcessingUserGesture())
       return;
     target_frame = GetDocument().GetFrame();
   } else {
     submission->ClearTarget();
   }
   if (!target_frame->GetPage())
     return;
 
   UseCounter::Count(GetDocument(), UseCounter::kFormsSubmitted);
   if (MixedContentChecker::IsMixedFormAction(GetDocument().GetFrame(),
@@ skipping 374 matching lines @@
   for (const auto& control : ListedElements()) {
     if (!control->IsFormControlElement())
       continue;
     if (ToHTMLFormControlElement(control)->CanBeSuccessfulSubmitButton())
       ToHTMLFormControlElement(control)->PseudoStateChanged(
           CSSSelector::kPseudoDefault);
   }
 }
 
 }  // namespace blink