Don't rely on SSL cipher fallback in proxy auth.

net/http/http_auth_controller.h

 // Copyright (c) 2012 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_HTTP_HTTP_AUTH_CONTROLLER_H_
 #define NET_HTTP_HTTP_AUTH_CONTROLLER_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 56 matching lines @@
   virtual bool HaveAuthHandler() const;
 
   virtual bool HaveAuth() const;
 
   virtual scoped_refptr<AuthChallengeInfo> auth_info();
 
   virtual bool IsAuthSchemeDisabled(HttpAuth::Scheme scheme) const;
   virtual void DisableAuthScheme(HttpAuth::Scheme scheme);
   virtual void DisableEmbeddedIdentity();
 
+  // Called when the connection has been closed, so the current handler (which
+  // contains state bound to the connection) should be dropped. If retrying on a
+  // new connection, the next call to MaybeGenerateAuthToken will retry the
+  // current auth scheme.
+  virtual void OnConnectionClosed();
+
  private:
   // Actions for InvalidateCurrentHandler()
   enum InvalidateHandlerAction {
     INVALIDATE_HANDLER_AND_CACHED_CREDENTIALS,
     INVALIDATE_HANDLER_AND_DISABLE_SCHEME,
     INVALIDATE_HANDLER
   };
 
   // So that we can mock this object.
   friend class base::RefCounted<HttpAuthController>;
@@ skipping 76 matching lines @@
   HttpAuthHandlerFactory* const http_auth_handler_factory_;
 
   std::set<HttpAuth::Scheme> disabled_schemes_;
 
   CompletionCallback callback_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_AUTH_CONTROLLER_H_