Make sure the key into the spdy session pool identifies the actual proxy used...

net/proxy/proxy_info.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_PROXY_PROXY_INFO_H_
 #define NET_PROXY_PROXY_INFO_H_
 #pragma once
 
 #include <string>
 
@@ skipping 59 matching lines @@
     return proxy_server().is_socks();
   }
 
   // Returns true if this proxy info has no proxies left to try.
   bool is_empty() const {
     return proxy_list_.IsEmpty();
   }
 
   // Returns the first valid proxy server. is_empty() must be false to be able
   // to call this function.
-  ProxyServer proxy_server() const { return proxy_list_.Get(); }
+  const ProxyServer& proxy_server() const { return proxy_list_.Get(); }
 
   // See description in ProxyList::ToPacString().
   std::string ToPacString() const;
 
   // Marks the current proxy as bad. Returns true if there is another proxy
   // available to try in proxy list_.
   bool Fallback(ProxyRetryInfoMap* proxy_retry_info) {
     return proxy_list_.Fallback(proxy_retry_info);
   }
 
@@ skipping 15 matching lines @@
   // try. If proxy_list_ is empty, then there is nothing left to fall back to.
   ProxyList proxy_list_;
 
   // This value identifies the proxy config used to initialize this object.
   ProxyConfig::ID config_id_;
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_INFO_H_