List Password Manager extensions in a static data structure

ios/chrome/browser/ui/activity_services/appex_constants.mm

 // Copyright 2015 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.
 
 #import "ios/chrome/browser/ui/activity_services/appex_constants.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace activity_services {
 
 // Values for these constants to communicate with Password Management iOS App
 // Extensions came from https://github.com/AgileBits/onepassword-app-extension
 NSString* const kPasswordAppExVersionNumberKey = @"version_number";
 NSString* const kPasswordAppExURLStringKey = @"url_string";
 NSString* const kPasswordAppExUsernameKey = @"username";
 NSString* const kPasswordAppExPasswordKey = @"password";
 
 NSNumber* const kPasswordAppExVersionNumber = @110;
 
 NSString* const kUTTypeAppExtensionFindLoginAction =
     @"org.appextension.chrome-password-action";
 
-// Known App Extensions.
-NSString* const kAppExtensionOnePassword =
-    @"com.agilebits.onepassword-ios.extension";
-NSString* const kAppExtensionLastPass = @"com.lastpass.ilastpass.LastPassExt";
-NSString* const kAppExtensionDashlanePrefix =
-    @"com.dashlane.dashlanephonefinal.";
-
 }  // namespace activity_services