Snapshot idea/138.1980 from git://git.jetbrains.org/idea/community.git

Change-Id: Ib567c9c152d770212a7a3db20fbf591c210920bd
diff --git a/python/helpers/pydev/pydevd_vars.py b/python/helpers/pydev/pydevd_vars.py
index 0cc45f7..3baea5b 100644
--- a/python/helpers/pydev/pydevd_vars.py
+++ b/python/helpers/pydev/pydevd_vars.py
@@ -3,10 +3,12 @@
 """
 import pickle
 from django_frame import DjangoTemplateFrame
+from pydevd_constants import * #@UnusedWildImport
 from types import * #@UnusedWildImport
 
 from pydevd_custom_frames import getCustomFrame
 from pydevd_xml import *
+from _pydev_imps import _pydev_thread
 
 try:
     from StringIO import StringIO
@@ -14,13 +16,10 @@
     from io import StringIO
 import sys #@Reimport
 
-if USE_LIB_COPY:
-    import _pydev_threading as threading
-else:
-    import threading
+import _pydev_threading as threading
 import traceback
 import pydevd_save_locals
-from pydev_imports import Exec, execfile
+from pydev_imports import Exec, quote, execfile
 
 try:
     import types
@@ -69,7 +68,7 @@
 # AdditionalFramesContainer
 #===============================================================================
 class AdditionalFramesContainer:
-    lock = threading.Lock()
+    lock = _pydev_thread.allocate_lock()
     additional_frames = {} #dict of dicts