Grab bag of clang fixes for Windows code

net/http/http_auth_sspi_win.h

Index: net/http/http_auth_sspi_win.h
diff --git a/net/http/http_auth_sspi_win.h b/net/http/http_auth_sspi_win.h
index 372f4bd38b6550be3b4b467e2e59d120ff1cd2a6..cc34c8fdb76a8c3ab0cb48bf6901d16d9274f85a 100644
--- a/net/http/http_auth_sspi_win.h
+++ b/net/http/http_auth_sspi_win.h
@@ -125,7 +125,7 @@ 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();
 
@@ -166,7 +166,7 @@ class NET_EXPORT_PRIVATE HttpAuthSSPI {
 
   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_;