Flush the SimpleBackendImpl's SWP in tests.

Fixes memory leaks.

BUG=278187
R=gavinp

Review URL: https://chromiumcodereview.appspot.com/22882009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@220615 0039d316-1c4b-4281-b951-d872f2087c98

net/disk_cache/disk_cache_test_base.cc

@@ -240,6 +240,8 @@ void DiskCacheTestWithCache::AddDelay() {
 }
 
 void DiskCacheTestWithCache::TearDown() {
+  base::RunLoop().RunUntilIdle();
+  disk_cache::SimpleBackendImpl::FlushWorkerPoolForTesting();
   base::RunLoop().RunUntilIdle();
   cache_.reset();
   if (cache_thread_.IsRunning())

net/disk_cache/simple/simple_backend_impl.cc

@@ -568,4 +568,9 @@ void SimpleBackendImpl::CheckIterationReturnValue(
   CallCompletionCallback(callback, error_code);
 }
 
+void SimpleBackendImpl::FlushWorkerPoolForTesting() {
+  if (g_sequenced_worker_pool)
+    g_sequenced_worker_pool->FlushForTesting();
+}
+
 }  // namespace disk_cache

net/disk_cache/simple/simple_backend_impl.h

@@ -64,6 +64,9 @@ class NET_EXPORT_PRIVATE SimpleBackendImpl : public Backend,
   // operations to construct a new object.
   void OnDeactivated(const SimpleEntryImpl* entry);
 
+  // Flush our SequencedWorkerPool.
+  static void FlushWorkerPoolForTesting();
+
   // Backend:
   virtual net::CacheType GetCacheType() const OVERRIDE;
   virtual int32 GetEntryCount() const OVERRIDE;