[Ozone] Proper cursor support for multi-monitor configurations

ui/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.cc

 // Copyright 2014 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/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h"
 
 #include <gestures/gestures.h>
 #include <libevdev/libevdev.h>
 
 #include "base/strings/stringprintf.h"
@@ skipping 232 matching lines @@
     DispatchMouseButton(EVDEV_MODIFIER_RIGHT_MOUSE_BUTTON, true);
   if (buttons->up & GESTURES_BUTTON_LEFT)
     DispatchMouseButton(EVDEV_MODIFIER_LEFT_MOUSE_BUTTON, false);
   if (buttons->up & GESTURES_BUTTON_MIDDLE)
     DispatchMouseButton(EVDEV_MODIFIER_MIDDLE_MOUSE_BUTTON, false);
   if (buttons->up & GESTURES_BUTTON_RIGHT)
     DispatchMouseButton(EVDEV_MODIFIER_RIGHT_MOUSE_BUTTON, false);
 }
 
 void GestureInterpreterLibevdevCros::Dispatch(Event* event) {
+  event->set_window(cursor_->window());
   dispatch_callback_.Run(event);
 }
 
 void GestureInterpreterLibevdevCros::DispatchMouseButton(unsigned int modifier,
                                                          bool down) {
   const gfx::PointF& loc = cursor_->location();
   int flag = modifiers_->GetEventFlagFromModifier(modifier);
   EventType type = (down ? ET_MOUSE_PRESSED : ET_MOUSE_RELEASED);
   modifiers_->UpdateModifier(modifier, down);
   MouseEvent event(type, loc, loc, modifiers_->GetModifierFlags() | flag, flag);
   Dispatch(&event);
 }
 
 }  // namespace ui