Add UseCounters for navigator.vibrate usage compared to site engagement.

third_party/WebKit/Source/modules/vibration/VibrationController.cpp

 /*
  *  Copyright (C) 2012 Samsung Electronics
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public License
  *  along with this library; see the file COPYING.LIB.  If not, write to
  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  *  Boston, MA 02110-1301, USA.
  */
 
 #include "modules/vibration/VibrationController.h"
 
 #include "bindings/modules/v8/UnsignedLongOrUnsignedLongSequence.h"
 #include "core/dom/Document.h"
 #include "core/frame/Navigator.h"
-#include "core/frame/UseCounter.h"
 #include "core/page/Page.h"
 #include "platform/mojo/MojoHelper.h"
 #include "public/platform/InterfaceProvider.h"
 
 // Maximum number of entries in a vibration pattern.
 const unsigned kVibrationPatternLengthMax = 99;
 
 // Maximum duration of a vibration is 10 seconds.
 const unsigned kVibrationDurationMsMax = 10000;
 
@@ skipping 147 matching lines @@
   if (!page()->isPageVisible())
     cancel();
 }
 
 DEFINE_TRACE(VibrationController) {
   ContextLifecycleObserver::trace(visitor);
   PageVisibilityObserver::trace(visitor);
 }
 
 }  // namespace blink