Revert of Tests: Simplify SequencedWorkerPoolOwner, call Shutdown on destructor.

base/test/launcher/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/test_launcher.h"
 
 #if defined(OS_POSIX)
 #include <fcntl.h>
 #endif
 
@@ skipping 449 matching lines @@
       retry_limit_(0),
       force_run_broken_tests_(false),
       run_result_(true),
       watchdog_timer_(FROM_HERE,
                       TimeDelta::FromSeconds(kOutputTimeoutSeconds),
                       this,
                       &TestLauncher::OnOutputTimeout),
       parallel_jobs_(parallel_jobs) {
 }
 
-TestLauncher::~TestLauncher() {}
+TestLauncher::~TestLauncher() {
+  if (worker_pool_owner_)
+    worker_pool_owner_->pool()->Shutdown();
+}
 
 bool TestLauncher::Run() {
   if (!Init())
     return false;
 
   // Value of |cycles_| changes after each iteration. Keep track of the
   // original value.
   int requested_cycles = cycles_;
 
 #if defined(OS_POSIX)
@@ skipping 604 matching lines @@
   }
 
   std::string snippet(full_output.substr(run_pos));
   if (end_pos != std::string::npos)
     snippet = full_output.substr(run_pos, end_pos - run_pos);
 
   return snippet;
 }
 
 }  // namespace base