Don't key client auth on HttpNetworkSession.

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 3c7a4dd7838be7326e714271c3baf1f4e869aa81..2d71670103a048ee6b6644da5ab05470f99e9dba 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -58,7 +58,6 @@ class ImageSkia;
 namespace net {
 class CookieOptions;
 class CookieStore;
-class HttpNetworkSession;
 class NetLog;
 class SSLCertRequestInfo;
 class SSLInfo;
@@ -403,7 +402,6 @@ class CONTENT_EXPORT ContentBrowserClient {
   virtual void SelectClientCertificate(
       int render_process_id,
       int render_frame_id,
-      const net::HttpNetworkSession* network_session,
       net::SSLCertRequestInfo* cert_request_info,
       const base::Callback<void(net::X509Certificate*)>& callback) {}