[Telemetry] Move listing stray processes to more appropriate places

tools/telemetry/telemetry/internal/util/global_hooks.py

Index: tools/telemetry/telemetry/internal/util/global_hooks.py
diff --git a/tools/telemetry/telemetry/internal/util/global_hooks.py b/tools/telemetry/telemetry/internal/util/global_hooks.py
index 7728234377bd597a9f8d51b04f244bf1e374b993..d34357552ea2dbcfa515eb928cf683b294936df2 100644
--- a/tools/telemetry/telemetry/internal/util/global_hooks.py
+++ b/tools/telemetry/telemetry/internal/util/global_hooks.py
@@ -3,12 +3,8 @@
 # found in the LICENSE file.
 
 """Hooks that apply globally to all scripts that import or use Telemetry."""
-import atexit
-import inspect
-import os
 import signal
 import sys
-import logging
 
 from telemetry.internal.util import exception_formatter
 
@@ -17,7 +13,6 @@ def InstallHooks():
   InstallUnhandledExceptionFormatter()
   InstallStackDumpOnSigusr1()
   InstallTerminationHook()
-  InstallListStrayProcessesUponExitHook()
 
 def InstallUnhandledExceptionFormatter():
   """Print prettier exceptions that also contain the stack frame's locals."""
@@ -43,38 +38,3 @@ def InstallTerminationHook():
     exception_formatter.PrintFormattedFrame(stack_frame, exception_string)
     sys.exit(-1)
   signal.signal(signal.SIGTERM, PrintStackAndExit)
-
-
-def InstallListStrayProcessesUponExitHook():
-  def _ListAllSubprocesses():
-    try:
-      import psutil
-    except ImportError:
-      logging.error(
-          'psutil is not installed on the system. Not listing possible '
-          'leaked processes. To install psutil, see: '
-          'https://pypi.python.org/pypi/psutil')
-      return
-    telemetry_pid = os.getpid()
-    parent = psutil.Process(telemetry_pid)
-    if hasattr(parent, 'children'):
-      children = parent.children(recursive=True)
-    else:  # Some old version of psutil use get_children instead children.
-      children = parent.get_children()
-    if children:
-      leak_processes_info = []
-      for p in children:
-        if inspect.ismethod(p.name):
-          name = p.name()
-        else:  # Process.name is a property in old versions of psutil.
-          name = p.name
-        process_info = '%s (%s)' % (name, p.pid)
-        try:
-          process_info += ' - %s' % p.cmdline()
-        except Exception:
-          pass
-        leak_processes_info.append(process_info)
-      logging.error('Telemetry leaks these processes: %s',
-                    ', '.join(leak_processes_info))
-
-  atexit.register(_ListAllSubprocesses)