Stop using CertStore which is not compatible with PlzNavigate.

content/public/browser/security_style_explanation.h

Index: content/public/browser/security_style_explanation.h
diff --git a/content/public/browser/security_style_explanation.h b/content/public/browser/security_style_explanation.h
index 1b8215e3cfc69a5542c982e0877205e7619277f0..18db638ce2ad115267fc5466b91db141cf7d23ad 100644
--- a/content/public/browser/security_style_explanation.h
+++ b/content/public/browser/security_style_explanation.h
@@ -20,16 +20,17 @@ struct SecurityStyleExplanation {
   CONTENT_EXPORT SecurityStyleExplanation(){};
   CONTENT_EXPORT SecurityStyleExplanation(const std::string& summary,
                                           const std::string& description)
-      : summary(summary), description(description), cert_id(0) {}
+      : summary(summary), description(description), has_certificate(false) {}
   CONTENT_EXPORT SecurityStyleExplanation(const std::string& summary,
                                           const std::string& description,
-                                          int cert_id)
-      : summary(summary), description(description), cert_id(cert_id) {}
+                                          bool has_certificate)
+      : summary(summary), description(description),
+        has_certificate(has_certificate) {}
   CONTENT_EXPORT ~SecurityStyleExplanation() {}
 
   std::string summary;
   std::string description;
-  int cert_id;
+  bool has_certificate;
 };
 
 }  // namespace content