Blink WebTouchPoint stores its location as WebFloatPoint, instead of WebPoint.

Source/web/WebInputEventConversion.cpp

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * 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
@@ skipping 389 matching lines @@
     return WebTouchPoint::StateUndefined;
 }
 
 PlatformTouchPointBuilder::PlatformTouchPointBuilder(Widget* widget, const WebTouchPoint& point)
 {
     float scale = widgetInputEventsScaleFactor(widget);
     IntSize offset = widgetInputEventsOffset(widget);
     m_id = point.id;
     m_state = toPlatformTouchPointState(point.state);
     m_pos = widget->convertFromContainingWindow(IntPoint((point.position.x - offset.width()) / scale, (point.position.y - offset.height()) / scale));
-    m_screenPos = point.screenPosition;
+    m_screenPos = IntPoint(point.screenPosition.x, point.screenPosition.y);
     m_radiusY = point.radiusY / scale;
     m_radiusX = point.radiusX / scale;
     m_rotationAngle = point.rotationAngle;
     m_force = point.force;
 }
 
 PlatformTouchEventBuilder::PlatformTouchEventBuilder(Widget* widget, const WebTouchEvent& event)
 {
     m_type = toPlatformTouchEventType(event.type);
 
@@ skipping 276 matching lines @@
 }
 
 static void addTouchPoints(const Widget* widget, const AtomicString& touchType, TouchList* touches, WebTouchPoint* touchPoints, unsigned* touchPointsLength, const WebCore::RenderObject* renderObject)
 {
     unsigned numberOfTouches = std::min(touches->length(), static_cast<unsigned>(WebTouchEvent::touchesLengthCap));
     for (unsigned i = 0; i < numberOfTouches; ++i) {
         const Touch* touch = touches->item(i);
 
         WebTouchPoint point;
         point.id = touch->identifier();
-        point.screenPosition = WebPoint(touch->screenX(), touch->screenY());
+        point.screenPosition = WebFloatPoint(touch->screenX(), touch->screenY());
         point.position = convertAbsoluteLocationForRenderObject(touch->absoluteLocation(), *renderObject);
         point.radiusX = touch->webkitRadiusX();
         point.radiusY = touch->webkitRadiusY();
         point.rotationAngle = touch->webkitRotationAngle();
         point.force = touch->webkitForce();
         point.state = toWebTouchPointState(touchType);
 
         touchPoints[i] = point;
     }
     *touchPointsLength = numberOfTouches;
@@ skipping 46 matching lines @@
     modifiers = getWebInputModifiers(event);
 
     globalX = event.screenX();
     globalY = event.screenY();
     IntPoint localPoint = convertAbsoluteLocationForRenderObject(event.absoluteLocation(), *renderObject);
     x = localPoint.x();
     y = localPoint.y();
 }
 
 } // namespace blink