Flush stdout when printing perf values for ChromeOS in pyauto perf tests.

chrome/test/functional/perf.py

Index: chrome/test/functional/perf.py
diff --git a/chrome/test/functional/perf.py b/chrome/test/functional/perf.py
index 35dd6617b3457ea0a991e7566ca2d3105c77ca35..8dbb1831ca760c8c4b4b2526c218574fca7fb8b7 100755
--- a/chrome/test/functional/perf.py
+++ b/chrome/test/functional/perf.py
@@ -30,6 +30,7 @@ import posixpath
 import re
 import SimpleHTTPServer
 import SocketServer
+import sys
 import tempfile
 import threading
 import time
@@ -135,6 +136,7 @@ class BasePerfTest(pyauto.PyUITest):
                         description, description[:30])
       print '\n%s(\'%s\', %.2f)%s' % (self._PERF_OUTPUT_MARKER_PRE, description,
                                       value, self._PERF_OUTPUT_MARKER_POST)
+      sys.stdout.flush()
 
   def _PrintSummaryResults(self, description, values, units):
     """Logs summary measurement information.