Define a LoggingSettings struct to use for InitLogging()

cloud_print/gcp20/prototype/gcp20_device.cc

Index: cloud_print/gcp20/prototype/gcp20_device.cc
diff --git a/cloud_print/gcp20/prototype/gcp20_device.cc b/cloud_print/gcp20/prototype/gcp20_device.cc
index f210063a7baab93a729d4ef4317f771c5843ff7c..5166e0deadd90fee4b145657676eca3c650416c8 100644
--- a/cloud_print/gcp20/prototype/gcp20_device.cc
+++ b/cloud_print/gcp20/prototype/gcp20_device.cc
@@ -12,11 +12,9 @@
 int main(int argc, char* argv[]) {
   CommandLine::Init(argc, argv);
 
-  logging::InitLogging(NULL,
-                       logging::LOG_ONLY_TO_SYSTEM_DEBUG_LOG,
-                       logging::LOCK_LOG_FILE,
-                       logging::APPEND_TO_OLD_LOG_FILE,
-                       logging::DISABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS);
+  logging::LogginSettings settings;
+  settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
+  logging::InitLogging(settings);
 
   DnsSdServer dns_sd_server;
   dns_sd_server.Start();