NSS: don't set environment variables when multi-threaded.

base/nss_util.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 BASE_NSS_UTIL_H_
 #define BASE_NSS_UTIL_H_
 #pragma once
 
 #include "base/basictypes.h"
 
 #if defined(USE_NSS)
 class FilePath;
 #endif  // defined(USE_NSS)
 
 // This file specifically doesn't depend on any NSS or NSPR headers because it
 // is included by various (non-crypto) parts of chrome to call the
 // initialization functions.
 namespace base {
 
 class Lock;
 class Time;
 
+#if defined(USE_NSS)
+// EarlySetupForNSSInit performs lightweight setup which must occur before the
+// process goes multithreaded. This does not initialise NSS. For test, see
+// EnsureNSSInit.
+void EarlySetupForNSSInit();
+#endif
+
 // Initialize NRPR if it isn't already initialized.  This function is
 // thread-safe, and NSPR will only ever be initialized once.  NSPR will be
 // properly shut down on program exit.
 void EnsureNSPRInit();
 
 // Initialize NSS if it isn't already initialized.  This must be called before
 // any other NSS functions.  This function is thread-safe, and NSS will only
 // ever be initialized once.  NSS will be properly shut down on program exit.
 void EnsureNSSInit();
 
@@ skipping 36 matching lines @@
  private:
   Lock *lock_;
   DISALLOW_COPY_AND_ASSIGN(AutoNSSWriteLock);
 };
 
 #endif  // defined(USE_NSS)
 
 }  // namespace base
 
 #endif  // BASE_NSS_UTIL_H_