Extract touch handling logic from EventHandler

third_party/WebKit/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 436 matching lines @@
         return WebTouchPoint::StateMoved;
     return WebTouchPoint::StateUndefined;
 }
 
 // TODO(mustaq): Add tests for this.
 PlatformTouchPointBuilder::PlatformTouchPointBuilder(Widget* widget, const WebTouchPoint& point)
 {
     m_pointerProperties = point;
     m_state = toPlatformTouchPointState(point.state);
 
-    // This assumes convertFromRootFrame does only translations, not scales.
     FloatPoint floatPos = convertHitPointToRootFrame(widget, point.position);
     IntPoint flooredPoint = flooredIntPoint(floatPos);
     m_pos = widget->convertFromRootFrame(flooredPoint) + (floatPos - flooredPoint);
 
     m_screenPos = FloatPoint(point.screenPosition.x, point.screenPosition.y);
     m_radius = scaleSizeToWindow(widget, FloatSize(point.radiusX, point.radiusY));
     m_rotationAngle = point.rotationAngle;
 }
 
 PlatformTouchEventBuilder::PlatformTouchEventBuilder(Widget* widget, const WebTouchEvent& event)
@@ skipping 333 matching lines @@
         break;
     case GestureSourceTouchscreen:
         sourceDevice = WebGestureDeviceTouchscreen;
         break;
     case GestureSourceUninitialized:
         NOTREACHED();
     }
 }
 
 } // namespace blink