[test] Fix missing heartbeats in test runner.

tools/testrunner/local/progress.py

 # Copyright 2012 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 274 matching lines @@
       fail_text += "Command: %s" % EscapeCommand(self.runner.GetCommand(test))
       if test.output.HasCrashed():
         fail_text += "exit code: %d\n--- CRASHED ---" % test.output.exit_code
       if test.output.HasTimedOut():
         fail_text += "--- TIMEOUT ---"
     self.outputter.HasRunTest(
         [test.GetLabel()] + self.runner.context.mode_flags + test.flags,
         test.duration,
         fail_text)
 
+  def Heartbeat(self):
+    self.progress_indicator.Heartbeat()
 
 class JsonTestProgressIndicator(ProgressIndicator):
 
   def __init__(self, progress_indicator, json_test_results, arch, mode):
     self.progress_indicator = progress_indicator
     self.json_test_results = json_test_results
     self.arch = arch
     self.mode = mode
     self.results = []
     self.tests = []
@@ skipping 52 matching lines @@
           ABS_PATH_PREFIX, ""),
       "run": test.run,
       "stdout": test.output.stdout,
       "stderr": test.output.stderr,
       "exit_code": test.output.exit_code,
       "result": test.suite.GetOutcome(test),
       "expected": list(test.outcomes or ["PASS"]),
       "duration": test.duration,
     })
 
+  def Heartbeat(self):
+    self.progress_indicator.Heartbeat()
+
 
 PROGRESS_INDICATORS = {
   'verbose': VerboseProgressIndicator,
   'dots': DotsProgressIndicator,
   'color': ColorProgressIndicator,
   'mono': MonochromeProgressIndicator
 }