Remove SSLStatus::security_style member and content::SecurityStyle

ios/chrome/browser/ssl/ios_chrome_security_state_model_client.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 IOS_CHROME_BROWSER_SSL_IOS_CHROME_SECURITY_STATE_MODEL_CLIENT_H_
 #define IOS_CHROME_BROWSER_SSL_IOS_CHROME_SECURITY_STATE_MODEL_CLIENT_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 12 matching lines @@
       public web::WebStateUserData<IOSChromeSecurityStateModelClient> {
  public:
   ~IOSChromeSecurityStateModelClient() override;
 
   void GetSecurityInfo(
       security_state::SecurityStateModel::SecurityInfo* result) const;
 
   // SecurityStateModelClient:
   void GetVisibleSecurityState(
       security_state::SecurityStateModel::VisibleSecurityState* state) override;
-  bool RetrieveCert(scoped_refptr<net::X509Certificate>* cert) override;
   bool UsedPolicyInstalledCertificate() override;
   bool IsOriginSecure(const GURL& url) override;
 
  private:
   explicit IOSChromeSecurityStateModelClient(web::WebState* web_state);
   friend class web::WebStateUserData<IOSChromeSecurityStateModelClient>;
 
   web::WebState* web_state_;
   std::unique_ptr<security_state::SecurityStateModel> security_state_model_;
 
   DISALLOW_COPY_AND_ASSIGN(IOSChromeSecurityStateModelClient);
 };
 
 #endif  // IOS_CHROME_BROWSER_SSL_IOS_CHROME_SECURITY_STATE_MODEL_CLIENT_H_