[Ozone] Proper cursor support for multi-monitor configurations

ui/base/cursor/ozone/cursor_factory_ozone.h

Index: ui/base/cursor/ozone/cursor_factory_ozone.h
diff --git a/ui/base/cursor/ozone/cursor_factory_ozone.h b/ui/base/cursor/ozone/cursor_factory_ozone.h
index 8ea2e742585a93dbf19a344d327d3e5fb604cba7..aefa7fdc47f9f07de005b245d2018544bb8ba848 100644
--- a/ui/base/cursor/ozone/cursor_factory_ozone.h
+++ b/ui/base/cursor/ozone/cursor_factory_ozone.h
@@ -43,6 +43,11 @@ class UI_BASE_EXPORT CursorFactoryOzone {
   // TODO(spang): Move this.
   virtual void SetCursor(gfx::AcceleratedWidget widget, PlatformCursor cursor);
 
+  // Returns the window on which the cursor is active.
+  // TODO(dnicoara) Move this once the WindowTreeHost refactoring finishes and
+  // WindowTreeHost::CanDispatchEvent() is no longer present.
+  virtual gfx::AcceleratedWidget GetActiveWindow();
+
  private:
   static CursorFactoryOzone* impl_;  // not owned
 };