Add use counter when touch-action isn't used when preventDefault'd.

third_party/WebKit/Source/core/events/TouchEvent.h

 /*
  * Copyright 2008, The Android Open Source Project
  * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above copyright
@@ skipping 35 matching lines @@
   static TouchEvent* create() { return new TouchEvent; }
   static TouchEvent* create(TouchList* touches,
                             TouchList* targetTouches,
                             TouchList* changedTouches,
                             const AtomicString& type,
                             AbstractView* view,
                             PlatformEvent::Modifiers modifiers,
                             bool cancelable,
                             bool causesScrollingIfUncanceled,
                             bool firstTouchMoveOrStart,
-                            double platformTimeStamp) {
+                            double platformTimeStamp,
+                            TouchAction currentTouchAction) {
     return new TouchEvent(touches, targetTouches, changedTouches, type, view,
                           modifiers, cancelable, causesScrollingIfUncanceled,
-                          firstTouchMoveOrStart, platformTimeStamp);
+                          firstTouchMoveOrStart, platformTimeStamp,
+                          currentTouchAction);
   }
 
   static TouchEvent* create(const AtomicString& type,
                             const TouchEventInit& initializer) {
     return new TouchEvent(type, initializer);
   }
 
   TouchList* touches() const { return m_touches.get(); }
   TouchList* targetTouches() const { return m_targetTouches.get(); }
   TouchList* changedTouches() const { return m_changedTouches.get(); }
@@ skipping 26 matching lines @@
   TouchEvent();
   TouchEvent(TouchList* touches,
              TouchList* targetTouches,
              TouchList* changedTouches,
              const AtomicString& type,
              AbstractView*,
              PlatformEvent::Modifiers,
              bool cancelable,
              bool causesScrollingIfUncanceled,
              bool firstTouchMoveOrStart,
-             double platformTimeStamp);
+             double platformTimeStamp,
+             TouchAction currentTouchAction);
   TouchEvent(const AtomicString&, const TouchEventInit&);
 
   Member<TouchList> m_touches;
   Member<TouchList> m_targetTouches;
   Member<TouchList> m_changedTouches;
   bool m_causesScrollingIfUncanceled;
   bool m_firstTouchMoveOrStart;
   bool m_defaultPreventedBeforeCurrentTarget;
+  TouchAction m_currentTouchAction;

[Rick Byers, 2016/11/07 17:01:09]

Define this precisely in a comment.  Is it the touch action that was computed
when the first finger went down?  Maybe comment that this is for
analytics/logging only - should never impact the behavior?

[dtapuska, 2016/11/07 18:51:40]

Done.

 };
 
 class TouchEventDispatchMediator final : public EventDispatchMediator {
  public:
   static TouchEventDispatchMediator* create(TouchEvent*);
 
  private:
   explicit TouchEventDispatchMediator(TouchEvent*);
   TouchEvent& event() const;
   DispatchEventResult dispatchEvent(EventDispatcher&) const override;
 };
 
 DEFINE_EVENT_TYPE_CASTS(TouchEvent);
 
 }  // namespace blink
 
 #endif  // TouchEvent_h