[Ozone] Proper cursor support for multi-monitor configurations

ui/aura/window_tree_host_ozone.cc

 // Copyright 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 "ui/aura/window_tree_host_ozone.h"
 
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/cursor/ozone/cursor_factory_ozone.h"
 #include "ui/events/ozone/event_factory_ozone.h"
 #include "ui/events/platform/platform_event_source.h"
@@ skipping 22 matching lines @@
 
 WindowTreeHostOzone::~WindowTreeHostOzone() {
   ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
   DestroyCompositor();
   DestroyDispatcher();
 }
 
 bool WindowTreeHostOzone::CanDispatchEvent(const ui::PlatformEvent& ne) {
   CHECK(ne);
   ui::Event* event = static_cast<ui::Event*>(ne);
-  if (event->IsMouseEvent() || event->IsScrollEvent() || event->IsTouchEvent())
-    return bounds_.Contains(static_cast<ui::LocatedEvent*>(event)->location());
+  if (event->IsMouseEvent() || event->IsScrollEvent())
+    return ui::CursorFactoryOzone::GetInstance()->GetCursorWindow() == widget_;
+
   return true;
 }
 
 uint32_t WindowTreeHostOzone::DispatchEvent(const ui::PlatformEvent& ne) {
   ui::Event* event = static_cast<ui::Event*>(ne);
   ui::EventDispatchDetails details ALLOW_UNUSED = SendEventToProcessor(event);
   return ui::POST_DISPATCH_STOP_PROPAGATION;
 }
 
 ui::EventSource* WindowTreeHostOzone::GetEventSource() {
@@ skipping 61 matching lines @@
   return new WindowTreeHostOzone(bounds);
 }
 
 // static
 gfx::Size WindowTreeHost::GetNativeScreenSize() {
   NOTIMPLEMENTED();
   return gfx::Size();
 }
 
 }  // namespace aura