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..1df8706ef0cff7e9250e5a4299818c5fcb61b0f7 100644
--- a/chromecast/browser/cast_content_browser_client.h
+++ b/chromecast/browser/cast_content_browser_client.h
@@ -30,6 +30,7 @@ class MetricsService;
 }
 
 namespace net {
+class SSLPrivateKey;
 class URLRequestContextGetter;
 class X509Certificate;
 }
@@ -148,7 +149,7 @@ 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,
@@ -189,10 +190,13 @@ 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,
+      const base::Callback<void(scoped_refptr<net::X509Certificate>,
+                                scoped_refptr<net::SSLPrivateKey>)>&
+          continue_callback);
 #if !defined(OS_ANDROID)
   // Returns the crash signal FD corresponding to the current process type.
   int GetCrashSignalFD(const base::CommandLine& command_line);