[fuchsia] Send a null client certificate

Bug: 1176941
Change-Id: I9fffe2b139aef19bb6f95663bc4d725632df59c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2686455
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#852840}

fuchsia/engine/browser/web_engine_content_browser_client.cc

@@ -13,6 +13,7 @@
 #include "base/strings/string_split.h"
 #include "components/policy/content/safe_sites_navigation_throttle.h"
 #include "components/version_info/version_info.h"
+#include "content/public/browser/client_certificate_delegate.h"
 #include "content/public/browser/devtools_manager_delegate.h"
 #include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/network_service_instance.h"
@@ -199,6 +200,16 @@ std::string WebEngineContentBrowserClient::GetAcceptLangs(
       ->GetPreferredLanguages();
 }
 
+base::OnceClosure WebEngineContentBrowserClient::SelectClientCertificate(
+    content::WebContents* web_contents,
+    net::SSLCertRequestInfo* cert_request_info,
+    net::ClientCertIdentityList client_certs,
+    std::unique_ptr<content::ClientCertificateDelegate> delegate) {
+  // Continue without a certificate.
+  delegate->ContinueWithCertificate(nullptr, nullptr);
+  return base::OnceClosure();
+}
+
 std::vector<std::unique_ptr<content::NavigationThrottle>>
 WebEngineContentBrowserClient::CreateThrottlesForNavigation(
     content::NavigationHandle* navigation_handle) {

fuchsia/engine/browser/web_engine_content_browser_client.h

@@ -52,6 +52,11 @@ class WebEngineContentBrowserClient : public content::ContentBrowserClient {
                                       int child_process_id) final;
   std::string GetApplicationLocale() final;
   std::string GetAcceptLangs(content::BrowserContext* context) final;
+  base::OnceClosure SelectClientCertificate(
+      content::WebContents* web_contents,
+      net::SSLCertRequestInfo* cert_request_info,
+      net::ClientCertIdentityList client_certs,
+      std::unique_ptr<content::ClientCertificateDelegate> delegate) final;
   std::vector<std::unique_ptr<content::NavigationThrottle>>
   CreateThrottlesForNavigation(
       content::NavigationHandle* navigation_handle) final;