Flush the SimpleBackendImpl's SWP in tests.

net/disk_cache/disk_cache_test_base.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/disk_cache/disk_cache_test_base.h"
 
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "net/base/io_buffer.h"
@@ skipping 211 matching lines @@
 
 void DiskCacheTestWithCache::AddDelay() {
   base::Time initial = base::Time::Now();
   while (base::Time::Now() <= initial) {
     base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(1));
   };
 }
 
 void DiskCacheTestWithCache::TearDown() {
   base::RunLoop().RunUntilIdle();
+  disk_cache::SimpleBackendImpl::FlushWorkerPoolForTesting();
+  base::RunLoop().RunUntilIdle();
   cache_.reset();
   if (cache_thread_.IsRunning())
     cache_thread_.Stop();
 
   if (!memory_only_ && !simple_cache_mode_ && integrity_) {
     EXPECT_TRUE(CheckCacheIntegrity(cache_path_, new_eviction_, mask_));
   }
 
   PlatformTest::TearDown();
 }
@@ skipping 56 matching lines @@
   if (size_)
     EXPECT_TRUE(cache_impl_->SetMaxSize(size_));
   if (new_eviction_)
     cache_impl_->SetNewEviction();
   cache_impl_->SetType(type_);
   cache_impl_->SetFlags(flags);
   net::TestCompletionCallback cb;
   int rv = cache_impl_->Init(cb.callback());
   ASSERT_EQ(net::OK, cb.GetResult(rv));
 }