Rename SecurityStyleExplanations and WebSecurityStyle fields

third_party/WebKit/public/platform/WebSecurityStyle.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 WebSecurityStyle_h
 #define WebSecurityStyle_h
 namespace blink {
 // This enum represents the security state of a resource.
 enum WebSecurityStyle {
   WebSecurityStyleUnknown,
-  WebSecurityStyleUnauthenticated,
-  WebSecurityStyleAuthenticationBroken,
+  WebSecurityStyleNeutral,
+  WebSecurityStyleInsecure,
   WebSecurityStyleWarning,
-  WebSecurityStyleAuthenticated,
-  WebSecurityStyleLast = WebSecurityStyleAuthenticated
+  WebSecurityStyleSecure,
+  WebSecurityStyleLast = WebSecurityStyleSecure
 };
 }  // namespace blink
 #endif