Disables the context menu in User Manager's reauth dialog

chrome/browser/ui/cocoa/profiles/user_manager_mac.mm

Index: chrome/browser/ui/cocoa/profiles/user_manager_mac.mm
diff --git a/chrome/browser/ui/cocoa/profiles/user_manager_mac.mm b/chrome/browser/ui/cocoa/profiles/user_manager_mac.mm
index 177a6df9f626e4d74a3aa3c6bb674ac1fdbedce4..04f21c679f4fc6c86ae187728856a09f5aeb4d4e 100644
--- a/chrome/browser/ui/cocoa/profiles/user_manager_mac.mm
+++ b/chrome/browser/ui/cocoa/profiles/user_manager_mac.mm
@@ -115,7 +115,8 @@ class UserManagerModalManagerDelegate :
 };
 
 // Custom WebContentsDelegate that allows handling of hotkeys.
-class UserManagerWebContentsDelegate : public content::WebContentsDelegate {
+class UserManagerWebContentsDelegate :
+    virtual public content::WebContentsDelegate {
  public:
   UserManagerWebContentsDelegate() {}
 
@@ -141,15 +142,15 @@ class UserManagerWebContentsDelegate : public content::WebContentsDelegate {
   }
 };
 
-class ReauthDialogDelegate : public UserManager::ReauthDialogObserver,
+class ReauthDialogDelegate : public UserManager::BaseReauthDialogDelegate,
                              public UserManagerWebContentsDelegate,
                              public ConstrainedWindowMacDelegate {
  public:
   ReauthDialogDelegate(content::WebContents* web_contents,
                        const std::string& email)
-      : UserManager::ReauthDialogObserver(web_contents, email) {}
+      : UserManager::BaseReauthDialogDelegate(web_contents) {}
 
-  // UserManager::ReauthDialogObserver:
+  // UserManager::BaseReauthDialogDelegate:
   void CloseReauthDialog() override {
     CloseInstanceReauthDialog();
   }