Revert of Revert of "Remove SSLClientAuthHandler's RDH dependency." (https://codereview.chromium.org/59687300…

content/public/browser/content_browser_client.cc

Index: content/public/browser/content_browser_client.cc
diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
index ae99730965706d35b49b2c11f0af37252dde37af..e32344940ef368946620a3856aceb1006f125c10 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -174,6 +174,14 @@
 
 QuotaPermissionContext* ContentBrowserClient::CreateQuotaPermissionContext() {
   return NULL;
+}
+
+void ContentBrowserClient::SelectClientCertificate(
+    int render_process_id,
+    int render_frame_id,
+    net::SSLCertRequestInfo* cert_request_info,
+    const base::Callback<void(net::X509Certificate*)>& callback) {
+  callback.Run(NULL);
 }
 
 net::URLRequestContext* ContentBrowserClient::OverrideRequestContextForURL(