base: Remove the string logging from CHECK().

net/tools/tld_cleanup/tld_cleanup_util.cc

Index: net/tools/tld_cleanup/tld_cleanup_util.cc
diff --git a/net/tools/tld_cleanup/tld_cleanup_util.cc b/net/tools/tld_cleanup/tld_cleanup_util.cc
index 6ed431f11773208bd77813018cf0ac9cce4c49c3..f83a973822836bcf96d2d43b95de8a7ddd02a976 100644
--- a/net/tools/tld_cleanup/tld_cleanup_util.cc
+++ b/net/tools/tld_cleanup/tld_cleanup_util.cc
@@ -177,8 +177,8 @@ NormalizeResult NormalizeDataToRuleMap(const std::string data,
         // wildcard for the same rule, or that the same domain is listed as both
         // private and not private. If we did, we'd have to update our
         // parsing code to handle this case.
-        CHECK(rules->find(domain) == rules->end())
-            << "Duplicate rule found for " << domain;
+        // Duplicate rule found for |domain|.
+        CHECK(rules->find(domain) == rules->end());
 
         (*rules)[domain] = rule;
         // Add true TLD for multi-level rules.  We don't add them right now, in