Add call to logging::InitLogging() during startup to write to stderr.

There's no need to write to a file since we only log messages for commandline parameter validations (ie. usage errors).

BUG=6446

TEST=unit test

Change-Id: I0e55d569534f953526a6b788dbc6b3e284ff8b4f

Review URL: http://codereview.chromium.org/3464008

crash_reporter/crash_reporter.cc

@@ -143,6 +143,10 @@ int main(int argc, char *argv[]) {
   FilePath my_path(argv[0]);
   file_util::AbsolutePath(&my_path);
   s_metrics_lib.Init();
+  InitLogging(NULL,
+              LOG_ONLY_TO_SYSTEM_DEBUG_LOG,
+              DONT_LOCK_LOG_FILE,
+              DELETE_OLD_LOG_FILE);
   s_system_log.Initialize(my_path.BaseName().value().c_str());
   KernelCollector kernel_collector;
   kernel_collector.Initialize(CountKernelCrash,