Make config path an absolute path in run-bisect-perf-regression.py.

tools/run-bisect-perf-regression.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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.
 
 """Run Performance Test Bisect Tool
 
 This script is used by a try bot to run the bisect script with the parameters
 specified in the bisect config file. It checks out a copy of the depot in
 a subdirectory 'bisect' of the working directory provided, annd runs the
 bisect scrip there.
 """
 
 import optparse
 import os
 import platform
 import subprocess
 import sys
 import traceback
 
 from auto_bisect import bisect_perf_regression
 from auto_bisect import bisect_utils
 from auto_bisect import math_utils
 
 CROS_BOARD_ENV = 'BISECT_CROS_BOARD'
 CROS_IP_ENV = 'BISECT_CROS_IP'
 
-SCRIPT_DIR = os.path.dirname(__file__)
+SCRIPT_DIR = os.path.abspath(os.path.dirname(__file__))
 SRC_DIR = os.path.join(SCRIPT_DIR, os.path.pardir)
 BISECT_CONFIG_PATH = os.path.join(SCRIPT_DIR, 'auto_bisect', 'bisect.cfg')
 RUN_TEST_CONFIG_PATH = os.path.join(SCRIPT_DIR, 'run-perf-test.cfg')
 WEBKIT_RUN_TEST_CONFIG_PATH = os.path.join(
     SRC_DIR, 'third_party', 'WebKit', 'Tools', 'run-perf-test.cfg')
 BISECT_SCRIPT_DIR = os.path.join(SCRIPT_DIR, 'auto_bisect')
 
 
 class Goma(object):
 
@@ skipping 518 matching lines @@
     if config and config_is_valid:
       return _SetupAndRunPerformanceTest(config, opts.path_to_goma)
 
   print ('Error: Could not load config file. Double check your changes to '
          'auto_bisect/bisect.cfg or run-perf-test.cfg for syntax errors.\n')
   return 1
 
 
 if __name__ == '__main__':
   sys.exit(main())