Grab bag of clang fixes for Windows code

net/http/http_auth_sspi_win.h

 // Copyright (c) 2011 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.
 
 // This file contains common routines used by NTLM and Negotiate authentication
 // using the SSPI API on Windows.
 
 #ifndef NET_HTTP_HTTP_AUTH_SSPI_WIN_H_
 #define NET_HTTP_HTTP_AUTH_SSPI_WIN_H_
 
@@ skipping 107 matching lines @@
 
   virtual SECURITY_STATUS FreeContextBuffer(PVOID pvContextBuffer) {
     return ::FreeContextBuffer(pvContextBuffer);
   }
 };
 
 class NET_EXPORT_PRIVATE HttpAuthSSPI {
  public:
   HttpAuthSSPI(SSPILibrary* sspi_library,
                const std::string& scheme,
-               SEC_WCHAR* security_package,
+               const SEC_WCHAR* security_package,
                ULONG max_token_length);
   ~HttpAuthSSPI();
 
   bool NeedsIdentity() const;
 
   bool AllowsExplicitCredentials() const;
 
   HttpAuth::AuthorizationResult ParseChallenge(
       HttpAuth::ChallengeTokenizer* tok);
 
@@ skipping 20 matching lines @@
       const std::wstring& spn,
       const void* in_token,
       int in_token_len,
       void** out_token,
       int* out_token_len);
 
   void ResetSecurityContext();
 
   SSPILibrary* library_;
   std::string scheme_;
-  SEC_WCHAR* security_package_;
+  const SEC_WCHAR* security_package_;
   std::string decoded_server_auth_token_;
   ULONG max_token_length_;
   CredHandle cred_;
   CtxtHandle ctxt_;
   bool can_delegate_;
 };
 
 // Splits |combined| into domain and username.
 // If |combined| is of form "FOO\bar", |domain| will contain "FOO" and |user|
 // will contain "bar".
@@ skipping 18 matching lines @@
 // If the return value is ERR_UNEXPECTED, there was an unanticipated problem
 // in the underlying SSPI call. The details are logged, and |*max_token_length|
 // is not changed.
 NET_EXPORT_PRIVATE int DetermineMaxTokenLength(SSPILibrary* library,
                                                const std::wstring& package,
                                                ULONG* max_token_length);
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_AUTH_SSPI_WIN_H_