exo: Fix multi-display hardware cursor

components/exo/wm_helper.cc

Index: components/exo/wm_helper.cc
diff --git a/components/exo/wm_helper.cc b/components/exo/wm_helper.cc
index 7f0cfcffe7264f5d77f685f28bacf65df824f359..b1a7cc916dd8f6dc89bd2dd6c6a28d7b008b7c31 100644
--- a/components/exo/wm_helper.cc
+++ b/components/exo/wm_helper.cc
@@ -111,6 +111,11 @@ void WMHelper::NotifyCursorSetChanged(ui::CursorSetType cursor_set) {
     observer.OnCursorSetChanged(cursor_set);
 }
 
+void WMHelper::NotifyCursorDisplayChanging(const display::Display& display) {
+  for (CursorObserver& observer : cursor_observers_)
+    observer.OnCursorDisplayChanging(display);
+}
+
 void WMHelper::NotifyMaximizeModeStarted() {
   for (MaximizeModeObserver& observer : maximize_mode_observers_)
     observer.OnMaximizeModeStarted();