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.

chromium_deps/base/BUILD

@@ -2,7 +2,11 @@
 
 cc_library(
     name = "glog",
-    hdrs = ["logging.h"],
+    hdrs = [
+        "check.h",
+        "check_op.h",
+        "logging.h"
+    ],
     strip_include_prefix = "//chromium_deps",
     visibility = ["//visibility:public"],
     deps = [