Enable loading native libraries with RTLD_DEEPBIND

base/native_library_test_library.cc

+// Copyright 2016 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.
+
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#define EXPORT __declspec(dllexport)
+#else
+#define EXPORT __attribute__((visibility("default")))
+#endif
+
+extern "C" {
+
+// This symbol name must match the exported symbol in
+// native_library_unittest.cc.
+int EXPORT g_native_library_test_symbol = 0;
+
+int EXPORT GetTestValue() { return 42; }
+
+bool EXPORT IsSameTestSymbolAddress(int* address) {
+  return &g_native_library_test_symbol == address;
+}
+
+}  // extern "C"