Implement Timeline Based Measurement v2

tracing/bin/run_py_tests

 #!/usr/bin/env python
 # Copyright (c) 2015 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.
 
 import os
+import platform
 import sys
 
 _CATAPULT_PATH = os.path.abspath(os.path.join(
     os.path.dirname(__file__), os.path.pardir, os.path.pardir))
 _TRACING_PATH = os.path.join(_CATAPULT_PATH, 'tracing')
 
 
 def _RunTestsOrDie(top_level_dir):
   exit_code = run_with_typ.Run(top_level_dir, path=[_TRACING_PATH])
   if exit_code:
     sys.exit(exit_code)
 
 
 def _AddToPathIfNeeded(path):
   if path not in sys.path:
     sys.path.insert(0, path)
 
 
 if __name__ == '__main__':
   _AddToPathIfNeeded(_CATAPULT_PATH)
 
   from hooks import install
   if '--no-install-hooks' in sys.argv:
     sys.argv.remove('--no-install-hooks')
   else:
     install.InstallHooks()
 
   from catapult_build import run_with_typ
+  # https://github.com/catapult-project/catapult/issues/2050
+  if platform.system() != 'Windows':
+    _RunTestsOrDie(os.path.join(_TRACING_PATH, 'tracing'))
   _RunTestsOrDie(os.path.join(_TRACING_PATH, 'tracing_build'))
   sys.exit(0)