linux: don't always print dlopen errors from LoadNativeLibrary

chrome/nacl/nacl_main_platform_delegate_mac.mm

Index: chrome/nacl/nacl_main_platform_delegate_mac.mm
diff --git a/chrome/nacl/nacl_main_platform_delegate_mac.mm b/chrome/nacl/nacl_main_platform_delegate_mac.mm
index 19e7df7165bf23d1447c4436a589c7c3d55a4bfa..006ee2524d46a9e55d3d1d84ec93199083d2415a 100644
--- a/chrome/nacl/nacl_main_platform_delegate_mac.mm
+++ b/chrome/nacl/nacl_main_platform_delegate_mac.mm
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -47,7 +47,7 @@ void NaClMainPlatformDelegate::InitSandboxTests(bool no_sandbox) {
     FilePath test_dll_name =
       command_line.GetSwitchValuePath(switches::kTestNaClSandbox);
     if (!test_dll_name.empty()) {
-      sandbox_test_module_ = base::LoadNativeLibrary(test_dll_name);
+      sandbox_test_module_ = base::LoadNativeLibrary(test_dll_name, NULL);
       CHECK(sandbox_test_module_);
     }
   }