Enable TF for testing benchmarks.

test/benchmarks/testcfg.py

 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 13 matching lines @@
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
 import os
 import shutil
 import subprocess
 import tarfile
 
+from testrunner.local import statusfile
 from testrunner.local import testsuite
 from testrunner.objects import testcase
 
 
 class BenchmarksTestSuite(testsuite.TestSuite):
 
   def __init__(self, name, root):
     super(BenchmarksTestSuite, self).__init__(name, root)
     self.testroot = root
 
@@ skipping 132 matching lines @@
          "kraken-1.1/"),
         "8", "kraken")
 
     self._DownloadIfNecessary(
         "http://octane-benchmark.googlecode.com/svn/trunk/",
         "26", "octane")
 
     os.chdir(old_cwd)
 
   def VariantFlags(self, testcase, default_flags):
-    # Both --nocrankshaft and --stressopt are very slow.
-    return [[]]
+    if testcase.outcomes and statusfile.OnlyStandardVariant(testcase.outcomes):
+      return [[]]
+    # Both --nocrankshaft and --stressopt are very slow. Add TF but without
+    # always opt to match the way the benchmarks are run for performance
+    # testing.
+    return [[], ["--turbo-filter=*"]]
 
 
 def GetSuite(name, root):
   return BenchmarksTestSuite(name, root)