Do not retry the layout tests that produce unexpected results when running under Valgrind.

tools/valgrind/chrome_tests.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 ''' Runs various chrome tests through valgrind_test.py.'''
 
 import glob
 import logging
 import optparse
@@ skipping 370 matching lines @@
         os.remove(f)
     else:
       os.makedirs(out_dir)
     script = os.path.join(self._source_dir, "webkit", "tools", "layout_tests",
                           "run_webkit_tests.py")
     script_cmd = ["python", script, "-v",
                   "--run-singly",  # run a separate DumpRenderTree for each test
                   "--fully-parallel",
                   "--time-out-ms=200000",
                   "--noshow-results",
+                  "--no-retry-failures",  # retrying takes too much time
                   "--nocheck-sys-deps"]
     # Pass build mode to run_webkit_tests.py.  We aren't passed it directly,
     # so parse it out of build_dir.  run_webkit_tests.py can only handle
     # the two values "Release" and "Debug".
     # TODO(Hercules): unify how all our scripts pass around build mode
     # (--mode / --target / --build_dir / --debug)
     if self._options.build_dir.endswith("Debug"):
       script_cmd.append("--debug");
     if (chunk_size > 0):
       script_cmd.append("--run-chunk=%d:%d" % (chunk_num, chunk_size))
@@ skipping 152 matching lines @@
 
   for t in options.test:
     tests = ChromeTests(options, args, t)
     ret = tests.Run()
     if ret: return ret
   return 0
 
 
 if __name__ == "__main__":
   sys.exit(_main())