[Telemetry] Move listing stray processes to more appropriate places

tools/telemetry/telemetry/benchmark_runner.py

Index: tools/telemetry/telemetry/benchmark_runner.py
diff --git a/tools/telemetry/telemetry/benchmark_runner.py b/tools/telemetry/telemetry/benchmark_runner.py
index ad98b7f3d18e3c1fe254a66e2aeccacc6584fbd2..66c12a42b214ddd8b361a0037c627469f9b9e238 100644
--- a/tools/telemetry/telemetry/benchmark_runner.py
+++ b/tools/telemetry/telemetry/benchmark_runner.py
@@ -31,6 +31,7 @@ from telemetry.internal.browser import browser_finder
 from telemetry.internal.browser import browser_options
 from telemetry.internal.util import binary_manager
 from telemetry.internal.util import command_line
+from telemetry.internal.util import ps_util
 
 
 def _IsBenchmarkEnabled(benchmark_class, possible_browser):
@@ -387,6 +388,7 @@ def _GetJsonBenchmarkList(possible_browser, possible_reference_browser,
 
 
 def main(environment):
+  ps_util.EnableListingStrayProcessesUponExitHook()
   # Get the command name from the command line.
   if len(sys.argv) > 1 and sys.argv[1] == '--help':
     sys.argv[1] = 'help'