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diff --git a/chrome/third_party/mozilla_security_manager/nsUsageArrayHelper.cpp b/chrome/third_party/mozilla_security_manager/nsUsageArrayHelper.cpp
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+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Netscape security libraries.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *  John Gardiner Myers <jgmyers@speakeasy.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "chrome/third_party/mozilla_security_manager/nsUsageArrayHelper.h"
+
+#include "app/l10n_util.h"
+#include "grit/generated_resources.h"
+
+namespace mozilla_security_manager {
+
+void GetCertUsageStrings(CERTCertificate* cert, std::vector<std::string>* out) {
+  SECCertificateUsage usages = 0;
+  // TODO(wtc): See if we should use X509Certificate::Verify instead.
+  if (CERT_VerifyCertificateNow(CERT_GetDefaultCertDB(), cert, PR_TRUE,
+                                certificateUsageCheckAllUsages,
+                                NULL, &usages) == SECSuccess) {
+    static const struct {
+      SECCertificateUsage usage;
+      int string_id;
+    } usage_string_map[] = {
+      {certificateUsageSSLClient, IDS_CERT_USAGE_SSL_CLIENT},
+      {certificateUsageSSLServer, IDS_CERT_USAGE_SSL_SERVER},
+      {certificateUsageSSLServerWithStepUp,
+        IDS_CERT_USAGE_SSL_SERVER_WITH_STEPUP},
+      {certificateUsageEmailSigner, IDS_CERT_USAGE_EMAIL_SIGNER},
+      {certificateUsageEmailRecipient, IDS_CERT_USAGE_EMAIL_RECEIVER},
+      {certificateUsageObjectSigner, IDS_CERT_USAGE_OBJECT_SIGNER},
+      {certificateUsageSSLCA, IDS_CERT_USAGE_SSL_CA},
+      {certificateUsageStatusResponder, IDS_CERT_USAGE_STATUS_RESPONDER},
+    };
+    for (size_t i = 0; i < ARRAYSIZE_UNSAFE(usage_string_map); ++i) {
+      if (usages & usage_string_map[i].usage)
+        out->push_back(l10n_util::GetStringUTF8(
+            usage_string_map[i].string_id));
+    }
+  }
+}
+
+}  // namespace mozilla_security_manager