Remove UserGestureUtilizedCallback, it's unused outside of tests

third_party/WebKit/Source/core/loader/NavigationScheduler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2009 Adam Barth. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 392 matching lines @@
     Schedule(ScheduledRedirect::Create(delay, frame_->GetDocument(), url,
                                        delay <= 1));
   }
 }
 
 bool NavigationScheduler::MustReplaceCurrentItem(LocalFrame* target_frame) {
   // Non-user navigation before the page has finished firing onload should not
   // create a new back/forward item. See https://webkit.org/b/42861 for the
   // original motivation for this.
   if (!target_frame->GetDocument()->LoadEventFinished() &&
-      !UserGestureIndicator::UtilizeUserGesture())
+      !UserGestureIndicator::ProcessingUserGesture())
     return true;
 
   // Navigation of a subframe during loading of an ancestor frame does not
   // create a new back/forward item. The definition of "during load" is any time
   // before all handlers for the load event have been run. See
   // https://bugs.webkit.org/show_bug.cgi?id=14957 for the original motivation
   // for this.
   Frame* parent_frame = target_frame->Tree().Parent();
   return parent_frame && parent_frame->IsLocalFrame() &&
          !ToLocalFrame(parent_frame)->Loader().AllAncestorsAreComplete();
@@ skipping 122 matching lines @@
   navigate_task_handle_.Cancel();
   redirect_.Clear();
 }
 
 DEFINE_TRACE(NavigationScheduler) {
   visitor->Trace(frame_);
   visitor->Trace(redirect_);
 }
 
 }  // namespace blink