Revert r80216 "Reapply r79779: "Removed gclient_utils.Popen() and use subprocess2's ...""

Horked windows slaves this time.

R=dpranke@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/6689023

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@80220 0039d316-1c4b-4281-b951-d872f2087c98

subprocess2.py

@@ -8,7 +8,6 @@ In theory you shouldn't need anything else in subprocess, or this module failed.
 """
 
 from __future__ import with_statement
-import errno
 import logging
 import os
 import subprocess
@@ -125,7 +124,7 @@ def get_english_env(env):
 
 
 def Popen(args, **kwargs):
-  """Wraps subprocess.Popen() with various workarounds.
+  """Wraps subprocess.Popen().
 
   Returns a subprocess.Popen object.
 
@@ -135,8 +134,7 @@ def Popen(args, **kwargs):
     shell parameter to a value.
   - Adds support for VOID to not buffer when not needed.
 
-  Note: Popen() can throw OSError when cwd or args[0] doesn't exist. Translate
-  exceptions generated by cygwin when it fails trying to emulate fork().
+  Note: Popen() can throw OSError when cwd or args[0] doesn't exist.
   """
   # Make sure we hack subprocess if necessary.
   hack_subprocess()
@@ -162,20 +160,7 @@ def Popen(args, **kwargs):
     kwargs['stdout'] = open(os.devnull, 'w')
   if kwargs.get('stderr') in (VOID, os.devnull):
     kwargs['stderr'] = open(os.devnull, 'w')
-  try:
-    return subprocess.Popen(args, **kwargs)
-  except OSError, e:
-    if e.errno == errno.EAGAIN and sys.platform == 'cygwin':
-      # Convert fork() emulation failure into a CalledProcessError().
-      raise CalledProcessError(
-          e.errno,
-          args,
-          kwargs.get('cwd'),
-          'Visit '
-          'http://code.google.com/p/chromium/wiki/CygwinDllRemappingFailure to '
-          'learn how to fix this error; you need to rebase your cygwin dlls',
-          None)
-    raise
+  return subprocess.Popen(args, **kwargs)
 
 
 def call(args, timeout=None, **kwargs):