cros_build_lib.run: clean up redirect_std{err,out}->std{err,out} migration

BUG=chromium:1006587
TEST=`./run_tests` passes

Change-Id: I5aa3f8e4c69ce47e1c1c4731800948c22d1ebf1e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1976270
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/deploy_chrome.py b/scripts/deploy_chrome.py
index f82815c..5acc9c1 100644
--- a/scripts/deploy_chrome.py
+++ b/scripts/deploy_chrome.py
@@ -125,7 +125,7 @@
 
   def _GetStagingDirSize(self):
     result = cros_build_lib.dbg_run(['du', '-ks', self.staging_dir],
-                                    redirect_stdout=True, capture_output=True,
+                                    stdout=True, capture_output=True,
                                     encoding='utf-8')
     return int(result.output.split()[0])