Cancel client auth requests when not promptable.

content/shell/browser/shell_content_browser_client.cc

Index: content/shell/browser/shell_content_browser_client.cc
diff --git a/content/shell/browser/shell_content_browser_client.cc b/content/shell/browser/shell_content_browser_client.cc
index 927fdd7cc73d1aa61427ca4b1ede9e9f71290980..90cc70cfd2a1e47d4c3096abfa2a8dc017a69b43 100644
--- a/content/shell/browser/shell_content_browser_client.cc
+++ b/content/shell/browser/shell_content_browser_client.cc
@@ -10,6 +10,7 @@
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
+#include "content/public/browser/client_certificate_delegate.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/resource_dispatcher_host.h"
@@ -287,6 +288,14 @@ ShellContentBrowserClient::CreateQuotaPermissionContext() {
   return new ShellQuotaPermissionContext();
 }
 
+void ShellContentBrowserClient::SelectClientCertificate(
+    WebContents* web_contents,
+    net::SSLCertRequestInfo* cert_request_info,
+    scoped_ptr<ClientCertificateDelegate> delegate) {
+  if (!select_client_certificate_callback_.is_null())
+    select_client_certificate_callback_.Run();
+}
+
 void ShellContentBrowserClient::RequestPermission(
     PermissionType permission,
     WebContents* web_contents,