ClientCertStoreWin: do client cert and key lookup on SSLPlatformKeyTaskRunner.

net/ssl/client_cert_store_win.h

Index: net/ssl/client_cert_store_win.h
diff --git a/net/ssl/client_cert_store_win.h b/net/ssl/client_cert_store_win.h
index 0665a9d5ae73b0c0204942bd3b2b7ff28cdcf5cc..4db6d4756b7c77babf4916118e151fe8360539b0 100644
--- a/net/ssl/client_cert_store_win.h
+++ b/net/ssl/client_cert_store_win.h
@@ -39,6 +39,10 @@ class NET_EXPORT ClientCertStoreWin : public ClientCertStore {
 
   friend class ClientCertStoreWinTestDelegate;
 
+  // Opens the "MY" cert store and uses it to lookup the client certs.
+  static ClientCertIdentityList GetClientCertsWithMyCertStore(
+      const SSLCertRequestInfo& request);
+
   // A hook for testing. Filters |input_certs| using the logic being used to
   // filter the system store when GetClientCerts() is called.
   // Implemented by creating a temporary in-memory store and filtering it