[test] Refactoring - Use subject/observer pattern for progress indicators.

tools/testrunner/local/execution.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 59 matching lines @@
     self.printed_allocations = False
     self.tests = [ t for s in suites for t in s.tests ]
     if not context.no_sorting:
       for t in self.tests:
         t.duration = self.perfdata.FetchPerfData(t) or 1.0
       self.tests.sort(key=lambda t: t.duration, reverse=True)
     self._CommonInit(len(self.tests), progress_indicator, context)
 
   def _CommonInit(self, num_tests, progress_indicator, context):
     self.indicator = progress_indicator
-    progress_indicator.runner = self
+    progress_indicator.SetRunner(self)
     self.context = context
     self.succeeded = 0
     self.total = num_tests
     self.remaining = num_tests
     self.failed = []
     self.crashed = 0
     self.reran_tests = 0
 
   def _RunPerfSafe(self, fun):
     try:
@@ skipping 191 matching lines @@
            test.suite.GetFlagsForTestCase(test, self.context) +
            self.context.extra_flags)
     return cmd
 
 
 class BreakNowException(Exception):
   def __init__(self, value):
     self.value = value
   def __str__(self):
     return repr(self.value)