Stop using CertStore which is not compatible with PlzNavigate.

ios/web/web_state/web_state_impl.h

 // Copyright 2013 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_WEB_WEB_STATE_WEB_STATE_IMPL_H_
 #define IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 224 matching lines @@
   const base::string16& GetTitle() const override;
   bool IsLoading() const override;
   double GetLoadingProgress() const override;
   bool IsBeingDestroyed() const override;
   const GURL& GetVisibleURL() const override;
   const GURL& GetLastCommittedURL() const override;
   GURL GetCurrentURL(URLVerificationTrustLevel* trust_level) const override;
   void ShowTransientContentView(CRWContentView* content_view) override;
   bool IsShowingWebInterstitial() const override;
   WebInterstitial* GetWebInterstitial() const override;
-  int GetCertGroupId() const override;
   void AddScriptCommandCallback(const ScriptCommandCallback& callback,
                                 const std::string& command_prefix) override;
   void RemoveScriptCommandCallback(const std::string& command_prefix) override;
   id<CRWWebViewProxy> GetWebViewProxy() const override;
   int DownloadImage(const GURL& url,
                     bool is_favicon,
                     uint32_t max_bitmap_size,
                     bool bypass_cache,
                     const ImageDownloadCallback& callback) override;
   shell::InterfaceRegistry* GetMojoInterfaceRegistry() override;
@@ skipping 112 matching lines @@
 
   // Mojo interface registry for this WebState.
   std::unique_ptr<shell::InterfaceRegistry> mojo_interface_registry_;
 
   DISALLOW_COPY_AND_ASSIGN(WebStateImpl);
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_