exo: Fix multi-display hardware cursor

ui/wm/core/cursor_manager.cc

Index: ui/wm/core/cursor_manager.cc
diff --git a/ui/wm/core/cursor_manager.cc b/ui/wm/core/cursor_manager.cc
index a411b7837edbd94ec7a5656928c0cbfd58c2e1fa..839a22e3d9c619fa34f8c03ddd93337681f59a5b 100644
--- a/ui/wm/core/cursor_manager.cc
+++ b/ui/wm/core/cursor_manager.cc
@@ -165,9 +165,17 @@ bool CursorManager::IsMouseEventsEnabled() const {
 }
 
 void CursorManager::SetDisplay(const display::Display& display) {
+  display_ = display;
+  for (auto& observer : observers_)
+    observer.OnCursorDisplayChanged(display);
+
   delegate_->SetDisplay(display, this);
 }
 
+const display::Display& CursorManager::GetDisplay() const {
+  return display_;
+}
+
 void CursorManager::LockCursor() {
   cursor_lock_count_++;
 }