ProfileChooserVIew heap-use-after-free fix

chrome/browser/ui/views/profiles/profile_chooser_view.h

Index: chrome/browser/ui/views/profiles/profile_chooser_view.h
diff --git a/chrome/browser/ui/views/profiles/profile_chooser_view.h b/chrome/browser/ui/views/profiles/profile_chooser_view.h
index f1d78921f05102a921768238d8a6f899a016e2e0..07e7c28420dd4dd83f0133e6f69dd36971c1d1ac 100644
--- a/chrome/browser/ui/views/profiles/profile_chooser_view.h
+++ b/chrome/browser/ui/views/profiles/profile_chooser_view.h
@@ -11,6 +11,7 @@
 #include "chrome/browser/profiles/avatar_menu.h"
 #include "chrome/browser/profiles/avatar_menu_observer.h"
 #include "chrome/browser/profiles/profile_metrics.h"
+#include "chrome/browser/ui/browser_list_observer.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/profile_chooser_constants.h"
 #include "components/signin/core/browser/signin_header_helper.h"
@@ -47,7 +48,8 @@ class ProfileChooserView : public content::WebContentsDelegate,
                            public views::StyledLabelListener,
                            public views::TextfieldController,
                            public AvatarMenuObserver,
-                           public OAuth2TokenService::Observer {
+                           public OAuth2TokenService::Observer,
+                           public chrome::BrowserListObserver {
  public:
   // Shows the bubble if one is not already showing.  This allows us to easily
   // make a button toggle the bubble on and off when clicked: we unconditionally
@@ -110,6 +112,9 @@ class ProfileChooserView : public content::WebContentsDelegate,
   void OnRefreshTokenAvailable(const std::string& account_id) override;
   void OnRefreshTokenRevoked(const std::string& account_id) override;
 
+  // chrome::BrowserListObserver overrides:
+  void OnBrowserRemoved(Browser* browser) override;
+
   static ProfileChooserView* profile_bubble_;
 
   // We normally close the bubble any time it becomes inactive but this can lead