Tests: Simplify SequencedWorkerPoolOwner, call Shutdown on destructor.

net/extras/sqlite/sqlite_persistent_cookie_store_unittest.cc

 // 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.
 
 #include "net/extras/sqlite/sqlite_persistent_cookie_store.h"
 
 #include <map>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 178 matching lines @@
     if (!base::ReadFileToString(temp_dir_.path().Append(kCookieFilename),
                                 &contents))
       return std::string();
     return contents;
   }
 
   void SetUp() override { ASSERT_TRUE(temp_dir_.CreateUniqueTempDir()); }
 
   void TearDown() override {
     DestroyStore();
-    pool_owner_->pool()->Shutdown();
   }
 
  protected:
   scoped_ptr<base::SequencedWorkerPoolOwner> pool_owner_;
   base::WaitableEvent loaded_event_;
   base::WaitableEvent key_loaded_event_;
   base::WaitableEvent db_thread_event_;
   CanonicalCookieVector cookies_;
   base::ScopedTempDir temp_dir_;
   scoped_refptr<SQLitePersistentCookieStore> store_;
@@ skipping 537 matching lines @@
   EXPECT_TRUE(was_called_with_no_cookies);
 
   // Same with trying to load a specific cookie.
   was_called_with_no_cookies = false;
   store_->LoadCookiesForKey("foo.bar", base::Bind(WasCalledWithNoCookies,
                                                   &was_called_with_no_cookies));
   EXPECT_TRUE(was_called_with_no_cookies);
 }
 
 }  // namespace net