Removing Nope button in Update password prompt according to mocks.

chrome/browser/password_manager/update_password_infobar_delegate_android.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_PASSWORD_MANAGER_UPDATE_PASSWORD_INFOBAR_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_PASSWORD_MANAGER_UPDATE_PASSWORD_INFOBAR_DELEGATE_ANDROID_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 41 matching lines @@
   }
 
  private:
   UpdatePasswordInfoBarDelegate(
       content::WebContents* web_contents,
       std::unique_ptr<password_manager::PasswordFormManager> form_to_update,
       bool is_smartlock_branding_enabled);
 
   // ConfirmInfoBarDelegate:
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
+  int GetButtons() const override;
   base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Accept() override;
-  bool Cancel() override;
 
   ManagePasswordsState passwords_state_;
   base::string16 branding_;
   bool is_smartlock_branding_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdatePasswordInfoBarDelegate);
 };
 
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_UPDATE_PASSWORD_INFOBAR_DELEGATE_ANDROID_H_