ui::LocatedEvent location() returns gfx::PointF

ash/display/event_transformation_handler.cc

 // Copyright (c) 2013 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 "ash/display/event_transformation_handler.h"
 
 #include <cmath>
 
 #include "ash/shell.h"
 #include "ash/wm/coordinate_conversion.h"
@@ skipping 22 matching lines @@
 
 EventTransformationHandler::~EventTransformationHandler() {
 }
 
 void EventTransformationHandler::OnScrollEvent(ui::ScrollEvent* event) {
   if (transformation_mode_ == TRANSFORM_NONE)
     return;
 
   // It is unnecessary to scale the event for the device scale factor since
   // the event locations etc. are already in DIP.
-  gfx::Point point_in_screen(event->location());
+  gfx::Point point_in_screen(gfx::ToFlooredPoint(event->location()));
   aura::Window* target = static_cast<aura::Window*>(event->target());
   wm::ConvertPointToScreen(target, &point_in_screen);
   const gfx::Display& display =
       Shell::GetScreen()->GetDisplayNearestPoint(point_in_screen);
 
   // Apply some additional scaling if the display is non-integrated.
   if (!display.IsInternal())
     event->Scale(kBoostForNonIntegrated);
 }
 
@@ skipping 30 matching lines @@
     return;
   }
 
   float area_ratio_sqrt = std::sqrt(area_ratio_map.begin()->second);
   event->set_radius_x(event->radius_x() * area_ratio_sqrt);
   event->set_radius_y(event->radius_y() * area_ratio_sqrt);
 }
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace ash