Chrome requires WebTouchPoint to store WebFloatPoint, instead of WebPoint.

content/browser/renderer_host/ui_events_helper.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/ui_events_helper.h"
 
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 
@@ skipping 103 matching lines @@
   }
 
   int flags = WebModifiersToUIFlags(touch.modifiers);
   base::TimeDelta timestamp = base::TimeDelta::FromMicroseconds(
       static_cast<int64>(touch.timeStampSeconds * 1000000));
   for (unsigned i = 0; i < touch.touchesLength; ++i) {
     const blink::WebTouchPoint& point = touch.touches[i];
     if (WebTouchPointStateToEventType(point.state) != type)
       continue;
     // ui events start in the co-ordinate space of the EventDispatcher.
-    gfx::Point location;
+    gfx::PointF location;
     if (coordinate_system == LOCAL_COORDINATES)
-      location = gfx::Point(point.position.x, point.position.y);
+      location = point.position;
     else
-      location = gfx::Point(point.screenPosition.x, point.screenPosition.y);
+      location = point.screenPosition;
     ui::TouchEvent* uievent = new ui::TouchEvent(type,
           location,
           flags,
           point.id,
           timestamp,
           point.radiusX,
           point.radiusY,
           point.rotationAngle,
           point.force);
     uievent->set_latency(touch_with_latency.latency);
@@ skipping 187 matching lines @@
 
   // Update the type of the touch event.
   web_event->type = TouchEventTypeFromEvent(event);
   web_event->timeStampSeconds = event.time_stamp().InSecondsF();
   web_event->modifiers = EventFlagsToWebEventModifiers(event.flags());
 
   return point;
 }
 
 }  // namespace content