Refactor client cert private key handling.

chromecast/browser/cast_content_browser_client.h

Index: chromecast/browser/cast_content_browser_client.h
diff --git a/chromecast/browser/cast_content_browser_client.h b/chromecast/browser/cast_content_browser_client.h
index 27a6447bbc1eb8df997e0bb8ff2c53b1391ce31b..5c7328748c3a7ec1feaf949abab694bae50590ac 100644
--- a/chromecast/browser/cast_content_browser_client.h
+++ b/chromecast/browser/cast_content_browser_client.h
@@ -31,7 +31,6 @@ class MetricsService;
 
 namespace net {
 class URLRequestContextGetter;
-class X509Certificate;
 }
 
 namespace service_manager {
@@ -148,7 +147,7 @@ class CastContentBrowserClient : public content::ContentBrowserClient {
   void SelectClientCertificate(
       content::WebContents* web_contents,
       net::SSLCertRequestInfo* cert_request_info,
-      net::CertificateList client_certs,
+      net::ClientCertIdentityList client_certs,
       std::unique_ptr<content::ClientCertificateDelegate> delegate) override;
   bool CanCreateWindow(content::RenderFrameHost* opener,
                        const GURL& opener_url,
@@ -189,9 +188,11 @@ class CastContentBrowserClient : public content::ContentBrowserClient {
   void AddNetworkHintsMessageFilter(int render_process_id,
                                     net::URLRequestContext* context);
 
-  net::X509Certificate* SelectClientCertificateOnIOThread(
+  void SelectClientCertificateOnIOThread(
       GURL requesting_url,
-      int render_process_id);
+      int render_process_id,
+      scoped_refptr<base::SequencedTaskRunner> original_runner,
+      std::unique_ptr<content::ClientCertificateDelegate> delegate);
 
 #if !defined(OS_ANDROID)
   // Returns the crash signal FD corresponding to the current process type.