Update comment about SIGINT on Windows in Executive.

third_party/WebKit/Tools/Scripts/webkitpy/common/system/executive.py

 # Copyright (c) 2009, Google Inc. All rights reserved.
 # Copyright (c) 2009 Apple Inc. 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
@@ skipping 274 matching lines @@
     def _windows_image_name(self, process_name):
         name, extension = os.path.splitext(process_name)
         if not extension:
             # taskkill expects processes to end in .exe
             # If necessary we could add a flag to disable appending .exe.
             process_name = "%s.exe" % name
         return process_name
 
     def interrupt(self, pid):
         interrupt_signal = signal.SIGINT
-        # FIXME: The python docs seem to imply that platform == 'win32' may need to use signal.CTRL_C_EVENT
-        # http://docs.python.org/2/library/signal.html
+        # Note: The python docs seem to suggest that on Windows, we may want to use
+        # signal.CTRL_C_EVENT (http://docs.python.org/2/library/signal.html), but
+        # it appears that signal.SIGINT also appears to work on Windows.
         try:
             os.kill(pid, interrupt_signal)
         except OSError:
             # Silently ignore when the pid doesn't exist.
             # It's impossible for callers to avoid race conditions with process shutdown.
             pass
 
     # Error handlers do not need to be static methods once all callers are
     # updated to use an Executive object.
 
@@ skipping 161 matching lines @@
             pool.close()
             pool.join()
 
 
 def _run_command_thunk(cmd_line_and_cwd):
     # Note that this needs to be a bare module (and hence Picklable) method to work with multiprocessing.Pool.
     (cmd_line, cwd) = cmd_line_and_cwd
     proc = subprocess.Popen(cmd_line, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     stdout, stderr = proc.communicate()
     return (proc.returncode, stdout, stderr)