Enable LSan leak checking for ASan bots.

tools-webrtc/mb/mb.py

 #!/usr/bin/env python
 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 """MB - the Meta-Build wrapper around GYP and GN
@@ skipping 1087 matching lines @@
             '../../tools-webrtc/gtest-parallel-wrapper.py',
             '--output_dir=%s' % output_dir,
             '--gtest_color=no',
             # We tell gtest-parallel to interrupt the test after 900 seconds,
             # so it can exit cleanly and report results, instead of being
             # interrupted by swarming and not reporting anything.
             '--timeout=900',
         ]
 
       asan = 'is_asan=true' in vals['gn_args']
+      lsan = 'is_lsan=true' in vals['gn_args']
       msan = 'is_msan=true' in vals['gn_args']
       tsan = 'is_tsan=true' in vals['gn_args']
 
       executable_prefix = '.\\' if self.platform == 'win32' else './'
       executable_suffix = '.exe' if self.platform == 'win32' else ''
       executable = executable_prefix + target + executable_suffix
 
       cmdline = (['../../testing/xvfb.py'] if xvfb else
                  ['../../testing/test_env.py'])
       cmdline += memcheck_cmdline if memcheck else gtest_parallel_wrapper
       cmdline.append(executable)
       if test_type == 'non_parallel_console_test_launcher' and not memcheck:
         # Still use the gtest-parallel-wrapper.py script since we need it to
         # run tests on swarming, but don't execute tests in parallel.
         cmdline.append('--workers=1')
 
       cmdline.extend([
           '--',
           '--asan=%d' % asan,
+          '--lsan=%d' % lsan,
           '--msan=%d' % msan,
           '--tsan=%d' % tsan,
       ])
 
     cmdline += isolate_map[target].get('args', [])
 
     return cmdline, extra_files
 
   def ToAbsPath(self, build_path, *comps):
     return self.PathJoin(self.src_dir,
@@ skipping 399 matching lines @@
   # Then check to see if the arg contains any metacharacters other than
   # double quotes; if it does, quote everything (including the double
   # quotes) for safety.
   if any(a in UNSAFE_FOR_CMD for a in arg):
     arg = ''.join('^' + a if a in ALL_META_CHARS else a for a in arg)
   return arg
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))