Update to Chromium //base at Chromium commit 3e81715e6d3a4324362635aea46ce1f1a163cca1.

test/launcher/unit_test_launcher.cc

 // Copyright 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.
 
 #include "base/test/launcher/unit_test_launcher.h"
 
+#include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/debug/debugger.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/format_macros.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 156 matching lines @@
               "Pass --test-launcher-debug-launcher to debug the launcher "
               "itself.\n");
       fflush(stdout);
       force_single_process = true;
     }
   }
 
   if (CommandLine::ForCurrentProcess()->HasSwitch(kGTestHelpFlag) ||
       CommandLine::ForCurrentProcess()->HasSwitch(kGTestListTestsFlag) ||
       CommandLine::ForCurrentProcess()->HasSwitch(kSingleProcessTestsFlag) ||
+      CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kTestChildProcess) ||
       force_single_process) {
     return run_test_suite.Run();
   }
 #endif
 
   if (CommandLine::ForCurrentProcess()->HasSwitch(kHelpFlag)) {
     PrintUsage();
     return 0;
   }
 
@@ skipping 384 matching lines @@
     TestLauncher* test_launcher,
     const std::vector<std::string>& test_names) {
   ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       Bind(&RunUnitTestsSerially, test_launcher, platform_delegate_, test_names,
            use_job_objects_ ? TestLauncher::USE_JOB_OBJECTS : 0));
   return test_names.size();
 }
 
 }  // namespace base