Make USE_OPENSSL and USE_NSS mutually exclusive

chrome/browser/importer/nss_decryptor_null.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 CHROME_BROWSER_IMPORTER_NSS_DECRYPTOR_NULL_H_
+#define CHROME_BROWSER_IMPORTER_NSS_DECRYPTOR_NULL_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/string16.h"
+
+class FilePath;
+
+namespace webkit_glue {
+struct PasswordForm;
+}
+
+// A NULL wrapper for Firefox NSS decrypt component, for use in builds where
+// we do not have the NSS library.
+class NSSDecryptor {
+ public:
+  NSSDecryptor() {}
+  bool Init(const std::wstring& /* dll_path */,
+            const std::wstring& db_path) { return false; }
+  string16 Decrypt(const std::string& crypt) const { return string16(); }
+  void ParseSignons(const std::string& content,
+                    std::vector<webkit_glue::PasswordForm>* forms) {}
+  bool ReadAndParseSignons(const FilePath& sqlite_file,
+                           std::vector<webkit_glue::PasswordForm>* forms) {
+    return false;
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NSSDecryptor);
+};
+
+#endif  // CHROME_BROWSER_IMPORTER_NSS_DECRYPTOR_NULL_H_