Fix sites with optional client certificate support

We fail to load pages that supports client certificates because we
didn't implement the client certificate selection.

This patch makes a small implementation that selects no certificate
whenever a client certificate is requested.

Task-number: QTBUG-56206
Change-Id: I95394d9664c7e8e4d03d9e63e5043da81e2672a4
Reviewed-by: Michael Brüning <[email protected]>

Author: Allan Sandfeld Jensen

src/core/content_browser_client_qt.cpp

@@ -47,6 +47,7 @@
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/public/browser/browser_main_parts.h"
 #include "content/public/browser/child_process_security_policy.h"
+#include "content/public/browser/client_certificate_delegate.h"
 #include "content/public/browser/media_observer.h"
 #include "content/public/browser/quota_permission_context.h"
 #include "content/public/browser/render_frame_host.h"
@@ -434,6 +435,13 @@ void ContentBrowserClientQt::AllowCertificateError(content::WebContents *webCont
         *result = content::CERTIFICATE_REQUEST_RESULT_TYPE_DENY;
 }
 
+void ContentBrowserClientQt::SelectClientCertificate(content::WebContents * /*webContents*/,
+                                                     net::SSLCertRequestInfo * /*certRequestInfo*/,
+                                                     scoped_ptr<content::ClientCertificateDelegate> delegate)
+{
+    delegate->ContinueWithCertificate(nullptr);
+}
+
 content::LocationProvider *ContentBrowserClientQt::OverrideSystemLocationProvider()
 {
 #ifdef QT_USE_POSITIONING

src/core/content_browser_client_qt.h

@@ -102,6 +102,9 @@ class ContentBrowserClientQt : public content::ContentBrowserClient {
                                        bool expired_previous_decision,
                                        const base::Callback<void(bool)>& callback,
                                        content::CertificateRequestResultType* result) Q_DECL_OVERRIDE;
+    virtual void SelectClientCertificate(content::WebContents* web_contents,
+                                         net::SSLCertRequestInfo* cert_request_info,
+                                         scoped_ptr<content::ClientCertificateDelegate> delegate) Q_DECL_OVERRIDE;
     content::LocationProvider* OverrideSystemLocationProvider() Q_DECL_OVERRIDE;
     content::DevToolsManagerDelegate *GetDevToolsManagerDelegate() Q_DECL_OVERRIDE;
     virtual net::URLRequestContextGetter *CreateRequestContext(content::BrowserContext *browser_context, content::ProtocolHandlerMap *protocol_handlers, content::URLRequestInterceptorScopedVector request_interceptorss) Q_DECL_OVERRIDE;