Revert "Move C++ helpers into |bssl| namespace."

This reverts commit 09feb0f3d95a2bc58ce0faaf14256d3bd30f52a4.

(In order to make WebRTC happy this also needs to be reverted.)
diff --git a/crypto/ecdsa/ecdsa_test.cc b/crypto/ecdsa/ecdsa_test.cc
index ad2325b..8d7827d 100644
--- a/crypto/ecdsa/ecdsa_test.cc
+++ b/crypto/ecdsa/ecdsa_test.cc
@@ -64,9 +64,6 @@
 
 #include "../test/scoped_types.h"
 
-
-namespace bssl {
-
 enum Api {
   kEncodedApi,
   kRawApi,
@@ -85,7 +82,7 @@
       if (!ECDSA_SIG_to_bytes(&der, &der_len, ecdsa_sig)) {
         return false;
       }
-      ScopedBytes delete_der(der);
+      ScopedOpenSSLBytes delete_der(der);
       actual_result = ECDSA_verify(0, digest, digest_len, der, der_len, eckey);
       break;
     }
@@ -331,7 +328,7 @@
   if (!ECDSA_SIG_to_bytes(&der, &der_len, sig.get())) {
     return false;
   }
-  ScopedBytes delete_der(der);
+  ScopedOpenSSLBytes delete_der(der);
 
   size_t max_len = ECDSA_SIG_max_len(order_len);
   if (max_len != der_len) {
@@ -343,8 +340,6 @@
   return true;
 }
 
-}  // namespace bssl
-
 static size_t BitsToBytes(size_t bits) {
   return (bits / 8) + (7 + (bits % 8)) / 8;
 }
@@ -352,12 +347,12 @@
 int main(void) {
   CRYPTO_library_init();
 
-  if (!bssl::TestBuiltin(stdout) ||
-      !bssl::TestECDSA_SIG_max_len(BitsToBytes(224)) ||
-      !bssl::TestECDSA_SIG_max_len(BitsToBytes(256)) ||
-      !bssl::TestECDSA_SIG_max_len(BitsToBytes(384)) ||
-      !bssl::TestECDSA_SIG_max_len(BitsToBytes(521)) ||
-      !bssl::TestECDSA_SIG_max_len(BitsToBytes(10000))) {
+  if (!TestBuiltin(stdout) ||
+      !TestECDSA_SIG_max_len(BitsToBytes(224)) ||
+      !TestECDSA_SIG_max_len(BitsToBytes(256)) ||
+      !TestECDSA_SIG_max_len(BitsToBytes(384)) ||
+      !TestECDSA_SIG_max_len(BitsToBytes(521)) ||
+      !TestECDSA_SIG_max_len(BitsToBytes(10000))) {
     printf("\nECDSA test failed\n");
     ERR_print_errors_fp(stdout);
     return 1;