Disable SPDY IP pooling for SSL connections with client authentication.

net/base/ssl_info.h

Index: net/base/ssl_info.h
===================================================================
--- net/base/ssl_info.h	(revision 107497)
+++ net/base/ssl_info.h	(working copy)
@@ -63,6 +63,12 @@
   // standard CA root. (As opposed to a user-installed root.)
   bool is_issued_by_known_root;
 
+  // True if a client certificate was sent to the server.  Note that sending
+  // a Certificate message with no client certificate in it does not count.
+  // TODO(wtc): if this info should be persisted, make this a bit in
+  // |connection_status|.
+  bool client_cert_sent;
+
   HandshakeType handshake_type;
 
   // The hashes of the SubjectPublicKeyInfos from each certificate in the chain.