Multiple Renewal Keys and Logging

In this code update we add a test to ensure that the White-box API
implementation handle seeing multiple renewal keys correctly. Since
there should be no more than one renewal key in a license response, upon
seeing a second renewal key, the implementation should return a
WB_RESULT_INVALID_PARAMETER code.

Due to changes in how Chrome manages CHECKS and DCHECKS, this code has
been updated to use the new headers.

api/test_license_builder.cc

@@ -4,7 +4,8 @@
 
 #include <ctime>
 
-#include "base/logging.h"
+#include "base/check.h"
+#include "base/check_op.h"
 #include "cdm/keys/certs.h"
 #include "crypto_utils/aes_cbc_encryptor.h"
 #include "crypto_utils/crypto_util.h"