Enable SWIG threading for PyAuto calls.

chrome/chrome_tests.gypi

 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
@@ skipping 3907 matching lines @@
               ],
               'outputs': [
                 '<(INTERMEDIATE_DIR)/pyautolib_wrap.cc',
                 '<(PRODUCT_DIR)/pyautolib.py',
               ],
               'action': [ 'python',
                           '../tools/swig/swig.py',
                           '-I..',
                           '-python',
                           '-c++',
+                          '-threads',
                           '-outdir',
                           '<(PRODUCT_DIR)',
                           '-o',
                           '<(INTERMEDIATE_DIR)/pyautolib_wrap.cc',
                           'test/pyautolib/pyautolib.i',
               ],
               'message': 'Generating swig wrappers for pyautolib.',
             },
           ],  # actions
         },  # target 'pyautolib'
@@ skipping 170 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }