exo: Fix multi-display hardware cursor

components/exo/wm_helper.cc

 // Copyright 2016 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 "components/exo/wm_helper.h"
 
 #include "base/memory/ptr_util.h"
 
 namespace exo {
 namespace {
@@ skipping 93 matching lines @@
 void WMHelper::NotifyCursorVisibilityChanged(bool is_visible) {
   for (CursorObserver& observer : cursor_observers_)
     observer.OnCursorVisibilityChanged(is_visible);
 }
 
 void WMHelper::NotifyCursorSetChanged(ui::CursorSetType cursor_set) {
   for (CursorObserver& observer : cursor_observers_)
     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();
 }
 
 void WMHelper::NotifyMaximizeModeEnding() {
   for (MaximizeModeObserver& observer : maximize_mode_observers_)
     observer.OnMaximizeModeEnding();
 }
 
@@ skipping 11 matching lines @@
   for (InputDeviceEventObserver& observer : input_device_event_observers_)
     observer.OnKeyboardDeviceConfigurationChanged();
 }
 
 void WMHelper::NotifyDisplayConfigurationChanged() {
   for (DisplayConfigurationObserver& observer : display_config_observers_)
     observer.OnDisplayConfigurationChanged();
 }
 
 }  // namespace exo