Cleanup unreachable cert adding code

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index ae7d92c4b948aeb9c2daf275c1b0f60acc930de8..dbad8deccb95c8112d514ddd6ef832a7c0b4cf85 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -478,16 +478,6 @@ class CONTENT_EXPORT ContentBrowserClient {
       net::SSLCertRequestInfo* cert_request_info,
       std::unique_ptr<ClientCertificateDelegate> delegate);
 
-  // Adds a new installable certificate or private key.
-  // Typically used to install an X.509 user certificate.
-  // Note that it's up to the embedder to verify that the data is
-  // well-formed. |cert_data| will be nullptr if |cert_size| is 0.
-  virtual void AddCertificate(net::CertificateMimeType cert_type,
-                              const void* cert_data,
-                              size_t cert_size,
-                              int render_process_id,
-                              int render_frame_id) {}
-
   // Returns a class to get notifications about media event. The embedder can
   // return nullptr if they're not interested.
   virtual MediaObserver* GetMediaObserver();