Fix the corner case issue with Android test sharder.

build/android/pylib/single_test_runner.py

 # Copyright (c) 2012 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.
 
 import glob
 import logging
 import os
 import sys
 
 from base_test_runner import BaseTestRunner
@@ skipping 311 matching lines @@
   def RunTests(self):
     """Runs all tests (in rebaseline mode, runs each test in isolation).
 
     Returns:
       A TestResults object.
     """
     try:
       if self.test_package.rebaseline:
         self.RebaselineTests()
       else:
-        if not self._gtest_filter:

[bulach, 2012/12/12 11:38:59]

yeah, I think this was done before we unified the sharder: it was possible to
hit here without a "-f" param, and so we'd run all the non-disabled tests..
now that we always go through sharding, even with one device, we always have the
filter set here.

btw, if you're willing to cleanup: the rebaseline option was done so when we
merged, we'd re-generate the foo_disabled_tests at once...

this is now truly obsolete, there's no scenario in which we'd regenerate that
file.. this "rebaseline" option pollutes and traverses a lot of layers, feel
free to clean up when you have a moment! 

-          self._gtest_filter = ('-' + ':'.join(self.GetDisabledTests()) + ':' +
-                               ':'.join(['*.' + x + '*' for x in
-                                 self.test_package.GetDisabledPrefixes()]))
         self.RunTestsWithFilter()
     except errors.DeviceUnresponsiveError as e:
       # Make sure this device is not attached
       if android_commands.IsDeviceAttached(self.device):
         raise e
 
       # Wrap the results
       logging.warning(e)
       failed_tests = []
       for t in self._gtest_filter.split(':'):
@@ skipping 20 matching lines @@
     self.tool.CleanUpEnvironment()
     if self.test_package.cleanup_test_files:
       self.adb.RemovePushedFiles()
     if self.dump_debug_info:
       self.dump_debug_info.StopRecordingLog()
     if self._performance_test_setup:
       self._performance_test_setup.TearDown()
     if self.dump_debug_info:
       self.dump_debug_info.ArchiveNewCrashFiles()
     super(SingleTestRunner, self).TearDown()