Remove empty {lsan,ubsan}.supp files.

infra/bots/recipe_modules/flavor/xsan_flavor.py

 # Copyright 2014 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.
 
 
 """Utils for running under *SAN"""
 
 
 import default_flavor
 
@@ skipping 37 matching lines @@
     # target_os 'llvm'.
     self.m.file.copytree(
         'copy llvm-build',
         self.m.vars.checkout_root.join('src', 'third_party', 'llvm-build'),
         swarming_out_dir.join('llvm-build'),
         symlinks=True)
 
   def step(self, name, cmd, env=None, **kwargs):
     """Wrapper for the Step API; runs a step as appropriate for this flavor."""
     skia_dir = self.m.vars.skia_dir
-    lsan_suppressions = skia_dir.join('tools', 'lsan.supp')
     tsan_suppressions = skia_dir.join('tools', 'tsan.supp')
-    ubsan_suppressions = skia_dir.join('tools', 'ubsan.supp')
     env = dict(env or {})
     env['ASAN_OPTIONS'] = 'symbolize=1 detect_leaks=1'
-    env['LSAN_OPTIONS'] = ('symbolize=1 print_suppressions=1 suppressions=%s' %
-                           lsan_suppressions)
+    env['LSAN_OPTIONS'] = 'symbolize=1 print_suppressions=1'
     env['TSAN_OPTIONS'] = 'suppressions=%s' % tsan_suppressions
-    env['UBSAN_OPTIONS'] = 'suppressions=%s' % ubsan_suppressions
     self.m.vars.default_env['PATH'] = '%%(PATH)s:%s' % (
         self.m.vars.slave_dir.join('llvm-build', 'Release+Asserts', 'bin'))
     env['LD_LIBRARY_PATH'] = self.m.vars.slave_dir.join(
         'third_party', 'externals', 'llvm', 'msan_out', 'lib')
 
     path_to_app = self.out_dir.join(cmd[0])
     new_cmd = [path_to_app]
     new_cmd.extend(cmd[1:])
     return self.m.run(self.m.step, name, cmd=new_cmd, env=env, **kwargs)