Check the root frame pointer events as well for capture

third_party/WebKit/Source/core/input/EventHandler.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 237 matching lines @@
   // direction - The logical direction to scroll in. This will be converted to
   //             a physical direction for each LayoutBox we try to scroll
   //             based on that box's writing mode.
   // granularity - The units that the  scroll delta parameter is in.
   // startNode - Optional. If provided, start chaining from the given node.
   //             If not, use the current focus or last clicked node.
   bool logicalScroll(ScrollDirection,
                      ScrollGranularity,
                      Node* startNode = nullptr);
 
+  bool isTouchPointerEventActiveOnFrame(int, LocalFrame*);

[mustaq, 2016/10/13 16:38:25]

Why is this touch specific? Could be useful for all pointerTypes.

[Navid Zolghadr, 2016/10/13 17:32:32]

Sure.

+
  private:
   WebInputEventResult handleMouseMoveOrLeaveEvent(
       const PlatformMouseEvent&,
       HitTestResult* hoveredNode = nullptr,
       bool onlyUpdateScrollbars = false,
       bool forceLeave = false);
 
   HitTestRequest::HitTestRequestType getHitTypeForGestureType(
       PlatformEvent::EventType);
   void applyTouchAdjustment(PlatformGestureEvent*, HitTestResult*);
@@ skipping 111 matching lines @@
 
   // Set on GestureTapDown if the |pointerdown| event corresponding to the
   // triggering |touchstart| event was canceled. This suppresses mouse event
   // firing for the current gesture sequence (i.e. until next GestureTapDown).
   bool m_suppressMouseEventsFromGestures;
 };
 
 }  // namespace blink
 
 #endif  // EventHandler_h