base: Remove the string logging from CHECK().

tools/json_schema_compiler/test/test_util.cc

Index: tools/json_schema_compiler/test/test_util.cc
diff --git a/tools/json_schema_compiler/test/test_util.cc b/tools/json_schema_compiler/test/test_util.cc
index 60744ba57b2e27297a01f93dacf72a9cfa18ce71..8e3cce2f487ab5fd4db287df702332a3882459f8 100644
--- a/tools/json_schema_compiler/test/test_util.cc
+++ b/tools/json_schema_compiler/test/test_util.cc
@@ -18,8 +18,8 @@ std::unique_ptr<base::Value> ReadJson(const base::StringPiece& json) {
   std::string error_msg;
   std::unique_ptr<base::Value> result(base::JSONReader::ReadAndReturnError(
       json, base::JSON_ALLOW_TRAILING_COMMAS, &error_code, &error_msg));
-  // CHECK not ASSERT since passing invalid |json| is a test error.
-  CHECK(result) << error_msg;
+  // Crash on failure since passing invalid |json| is a test error.
+  LOG_IF(FATAL, !result) << error_msg;
   return result;
 }