Fixes the interactive default browser UX for policy setting

chrome/browser/ui/startup/default_browser_prompt.cc

Index: chrome/browser/ui/startup/default_browser_prompt.cc
diff --git a/chrome/browser/ui/startup/default_browser_prompt.cc b/chrome/browser/ui/startup/default_browser_prompt.cc
index 2357af05a81693ea97858daf71362a4562b7128f..74896fc8cf5912b5d7db7286b614f89b9789fde7 100644
--- a/chrome/browser/ui/startup/default_browser_prompt.cc
+++ b/chrome/browser/ui/startup/default_browser_prompt.cc
@@ -177,7 +177,8 @@ bool DefaultBrowserInfoBarDelegate::Accept() {
                             InfoBarUserInteraction::START_SET_AS_DEFAULT,
                             NUM_INFO_BAR_USER_INTERACTION_TYPES);
   scoped_refptr<ShellIntegration::DefaultBrowserWorker>(
-      new ShellIntegration::DefaultBrowserWorker(nullptr))
+      new ShellIntegration::DefaultBrowserWorker(nullptr,
+                                                 /*delete_observer=*/false))
       ->StartSetAsDefault();
   return true;
 }
@@ -209,7 +210,6 @@ class CheckDefaultBrowserObserver
  private:
   void SetDefaultWebClientUIState(
       ShellIntegration::DefaultWebClientUIState state) override;
-  bool IsOwnedByWorker() override;
 
   void ResetCheckDefaultBrowserPref();
   void ShowPrompt();
@@ -247,11 +247,6 @@ void CheckDefaultBrowserObserver::SetDefaultWebClientUIState(
   }
 }
 
-bool CheckDefaultBrowserObserver::IsOwnedByWorker() {
-  // Instruct the DefaultBrowserWorker to delete this instance when it is done.
-  return true;
-}
-
 void CheckDefaultBrowserObserver::ResetCheckDefaultBrowserPref() {
   Profile* profile =
       g_browser_process->profile_manager()->GetProfileByPath(profile_path_);
@@ -323,7 +318,8 @@ void ShowDefaultBrowserPrompt(Profile* profile, HostDesktopType desktop_type) {
   scoped_refptr<ShellIntegration::DefaultBrowserWorker>(
       new ShellIntegration::DefaultBrowserWorker(
           new CheckDefaultBrowserObserver(profile->GetPath(), show_prompt,
-                                          desktop_type)))
+                                          desktop_type),
+          /*delete_observer=*/true))
       ->StartCheckIsDefault();
 }