Implement ScopedTestNSSDB instead of OpenTestNSSDB()

crypto/crypto_export.h

Index: crypto/crypto_export.h
diff --git a/crypto/crypto_export.h b/crypto/crypto_export.h
index f8b0b6c944f82d81f9359fdb50982094a1704805..983afe6d099631341d7f89e9e92e185e93f71dae 100644
--- a/crypto/crypto_export.h
+++ b/crypto/crypto_export.h
@@ -5,25 +5,34 @@
 #ifndef CRYPTO_CRYPTO_EXPORT_H_
 #define CRYPTO_CRYPTO_EXPORT_H_
 
+// Defines CRYPTO_EXPORT so that functionality implemented by the crypto module
+// can be exported to consumers, and CRYPTO_EXPORT_PRIVATE that allows unit
+// tests to access features not intended to be used directly by real consumers.
+
 #if defined(COMPONENT_BUILD)
 #if defined(WIN32)
 
 #if defined(CRYPTO_IMPLEMENTATION)
 #define CRYPTO_EXPORT __declspec(dllexport)
+#define CRYPTO_EXPORT_PRIVATE __declspec(dllexport)
 #else
 #define CRYPTO_EXPORT __declspec(dllimport)
+#define CRYPTO_EXPORT_PRIVATE __declspec(dllimport)
 #endif  // defined(CRYPTO_IMPLEMENTATION)
 
 #else  // defined(WIN32)
 #if defined(CRYPTO_IMPLEMENTATION)
 #define CRYPTO_EXPORT __attribute__((visibility("default")))
+#define CRYPTO_EXPORT_PRIVATE __attribute__((visibility("default")))
 #else
 #define CRYPTO_EXPORT
+#define CRYPTO_EXPORT_PRIVATE
 #endif
 #endif
 
 #else  // defined(COMPONENT_BUILD)
 #define CRYPTO_EXPORT
+#define CRYPTO_EXPORT_PRIVATE
 #endif
 
 #endif  // CRYPTO_CRYPTO_EXPORT_H_