crosperf: fix the error unexpected keyword argument 'command'

BUG=none
TEST=the error is gone.

Change-Id: I8dad69d2b45ed821be0c7be77e07b33cf0663eb9
Reviewed-on: https://chrome-internal-review.googlesource.com/293515
Reviewed-by: Yunlian Jiang <yunlian@google.com>
Commit-Queue: Yunlian Jiang <yunlian@google.com>
Tested-by: Yunlian Jiang <yunlian@google.com>
diff --git a/crosperf/suite_runner.py b/crosperf/suite_runner.py
index d2b72e8..df81ff2 100644
--- a/crosperf/suite_runner.py
+++ b/crosperf/suite_runner.py
@@ -135,7 +135,7 @@
   def DecreaseWaitTime(self, machine_name, chromeos_root):
     """Change the ten seconds wait time for pagecycler to two seconds."""
     FILE = '/usr/local/telemetry/src/tools/perf/page_sets/page_cycler_story.py'
-    ret = self._ce.CrosRunCommand(command='ls ' + FILE,
+    ret = self._ce.CrosRunCommand('ls ' + FILE,
                                   machine=machine_name,
                                   chromeos_root=chromeos_root)
     self._logger.LogFatalIf(ret, 'Could not find {} on machine: {}'.format(