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 variable name must match the exported variable in
+// native_library_unittest.cc.
+int EXPORT g_native_library_exported_value = 0;
+
+int EXPORT GetExportedValue() {
+  return g_native_library_exported_value;
+}
+
+void EXPORT SetExportedValue(int value) {
+  g_native_library_exported_value = value;
+}
+
+// This function name must match the exported function with the same signature
+// in native_library_unittest.cc. This function must return a different value
+// from the one defined there.
+int EXPORT GetNativeLibraryTestMagicValue() { return 42; }
+
+int EXPORT GetMagicValue() {
+  // When called by NativeLibraryTest.LoadLibraryPreferOwnSymbols, this should
+  // resolve to the local definition, even though the test module exports
+  // another symbol with the same name.
+  return GetNativeLibraryTestMagicValue();
+}
+
+int EXPORT GetSimpleTestValue() {
+  return 5;
+}
+
+}  // extern "C"