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diff --git a/net/base/auth.h b/net/base/auth.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef NET_BASE_AUTH_H__
+#define NET_BASE_AUTH_H__
+
+#include <string>
+
+#include "base/ref_counted.h"
+
+// Holds info about an authentication challenge that we may want to display
+// to the user.
+class AuthChallengeInfo :
+    public base::RefCountedThreadSafe<AuthChallengeInfo> {
+ public:
+  bool is_proxy;  // true for Proxy-Authenticate, false for WWW-Authenticate.
+  std::wstring host;  // the domain name of the server asking for auth
+  // (could be the proxy).
+  std::wstring scheme;  // "Basic", "Digest", or whatever other method is used.
+  std::wstring realm;  // the realm provided by the server, if there is one.
+
+ private:
+  friend base::RefCountedThreadSafe<AuthChallengeInfo>;
+  ~AuthChallengeInfo() {}
+};
+
+//Authentication structures
+enum AuthState {
+  AUTH_STATE_DONT_NEED_AUTH,
+  AUTH_STATE_NEED_AUTH,
+  AUTH_STATE_HAVE_AUTH,
+  AUTH_STATE_CANCELED
+};
+
+class AuthData : public base::RefCountedThreadSafe<AuthData> {
+ public:
+  AuthState state;  // whether we need, have, or gave up on authentication.
+  std::wstring scheme;  // the authentication scheme.
+  std::wstring username;  // the username supplied to us for auth.
+  std::wstring password;  // the password supplied to us for auth.
+
+  // We wouldn't instantiate this class if we didn't need authentication.
+  AuthData() : state(AUTH_STATE_NEED_AUTH) {}
+
+ private:
+  friend base::RefCountedThreadSafe<AuthData>;
+  ~AuthData() {}
+};
+
+#endif  // NET_BASE_AUTH_H__