Measure the usage of navigator.vibrate in for user gesture & subframe.

third_party/WebKit/Source/modules/vibration/NavigatorVibration.h

 /*
  *  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
@@ skipping 15 matching lines @@
 #include "platform/heap/GarbageCollected.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class Navigator;
 class VibrationController;
 
+enum NavigatorVibrationType {
+    MainFrameNoUserGesture = 0,
+    MainFrameWithUserGesture = 1,
+    SameOriginSubFrameNoUserGesture = 2,
+    SameOriginSubFrameWithUserGesture = 3,
+    CrossOriginSubFrameNoUserGesture = 4,
+    CrossOriginSubFrameWithUserGesture = 5,
+    EnumMax = 6
+};
+
 class MODULES_EXPORT NavigatorVibration final
     : public GarbageCollectedFinalized<NavigatorVibration>
     , public Supplement<Navigator>
     , public DOMWindowProperty {
     USING_GARBAGE_COLLECTED_MIXIN(NavigatorVibration);
     WTF_MAKE_NONCOPYABLE(NavigatorVibration);
 public:
     using VibrationPattern = Vector<unsigned>;
 
     virtual ~NavigatorVibration();
 
     static NavigatorVibration& from(Navigator&);
 
     static bool vibrate(Navigator&, unsigned time);
     static bool vibrate(Navigator&, const VibrationPattern&);
 
     VibrationController* controller();
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     static const char* supplementName();
 
     explicit NavigatorVibration(Navigator&);
 
     // Inherited from DOMWindowProperty.
     void willDetachGlobalObjectFromFrame() override;
 
+    static void collectHistogramMetrics(const LocalFrame&);
+
     Member<VibrationController> m_controller;
 };
 
 } // namespace blink
 
 #endif // NavigatorVibration_h