Split cursor location from UserDisplayManager.

services/ui/ws/display_manager.cc

Index: services/ui/ws/display_manager.cc
diff --git a/services/ui/ws/display_manager.cc b/services/ui/ws/display_manager.cc
index 199e1ae0dac2fee4da712df9b5c4f4b42f76297b..6d2071ab55a8ee2a144cee2e9c68e0ffeae17caa 100644
--- a/services/ui/ws/display_manager.cc
+++ b/services/ui/ws/display_manager.cc
@@ -49,6 +49,15 @@ UserDisplayManager* DisplayManager::GetUserDisplayManager(
   return user_display_managers_[user_id].get();
 }
 
+CursorLocationManager* DisplayManager::GetCursorLocationManager(
+    const UserId& user_id) {
+  if (!cursor_location_managers_.count(user_id)) {
+    cursor_location_managers_[user_id] =
+        base::MakeUnique<CursorLocationManager>();
+  }
+  return cursor_location_managers_[user_id].get();
+}
+
 void DisplayManager::AddDisplay(Display* display) {
   DCHECK_EQ(0u, pending_displays_.count(display));
   pending_displays_.insert(display);