Remove Event::system_location

ui/aura/root_window.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 "ui/aura/root_window.h"
 
 #include <vector>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 1131 matching lines @@
     return;
   gfx::Point host_mouse_location = root_mouse_location;
   ConvertPointToHost(&host_mouse_location);
 
   // TODO(derat|oshima): Don't use mouse_button_flags_ as it's
   // currently broken. See/ crbug.com/107931.
   ui::MouseEvent event(ui::ET_MOUSE_MOVED,
                        host_mouse_location,
                        host_mouse_location,
                        ui::EF_IS_SYNTHESIZED);
-  ConvertPointToNativeScreen(&root_mouse_location);
-  event.set_system_location(root_mouse_location);
   OnHostMouseEvent(&event);
 }
 
 gfx::Transform RootWindow::GetRootTransform() const {
   float scale = ui::GetDeviceScaleFactor(layer());
   gfx::Transform transform;
   transform.Scale(scale, scale);
   transform *= transformer_->GetTransform();
   return transform;
 }
 
 gfx::Transform RootWindow::GetInverseRootTransform() const {
   float scale = ui::GetDeviceScaleFactor(layer());
   gfx::Transform transform;
   transform.Scale(1.0f / scale, 1.0f / scale);
   return transformer_->GetInverseTransform() * transform;
 }
 
 }  // namespace aura