Supports window teleports for notifications.

chrome/browser/ui/ash/multi_user/multi_user_window_manager.h

Index: chrome/browser/ui/ash/multi_user/multi_user_window_manager.h
diff --git a/chrome/browser/ui/ash/multi_user/multi_user_window_manager.h b/chrome/browser/ui/ash/multi_user/multi_user_window_manager.h
index 51b75e2659cef2335d441e26051ea8f7111d98dd..a76091d6b0f9d75c9f980af67b51fe4e658891ac 100644
--- a/chrome/browser/ui/ash/multi_user/multi_user_window_manager.h
+++ b/chrome/browser/ui/ash/multi_user/multi_user_window_manager.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_UI_ASH_MULTI_USER_MULTI_USER_WINDOW_MANAGER_H_
 
 #include <map>
+#include <set>
 #include <string>
 
 class Browser;
@@ -90,6 +91,9 @@ class MultiUserWindowManager {
   // Returns true when windows are shared among users.
   virtual bool AreWindowsSharedAmongUsers() = 0;
 
+  // Get the owners for the visible windows and set them to |user_ids|.
+  virtual void GetOwnersOfVisibleWindows(std::set<std::string>* user_ids) = 0;
+
   // A query call for a given window to see if it is on the given user's
   // desktop.
   virtual bool IsWindowOnDesktopOfUser(aura::Window* window,