Flush SimpleCache worker pool between all tests.

content/browser/service_worker/service_worker_cache_storage_manager_unittest.cc

Index: content/browser/service_worker/service_worker_cache_storage_manager_unittest.cc
diff --git a/content/browser/service_worker/service_worker_cache_storage_manager_unittest.cc b/content/browser/service_worker/service_worker_cache_storage_manager_unittest.cc
index de8a58ad3b81894661ba18bd1f4bf23777ae9d5a..e44618b2e3bf161e61ad2e8dbea065c6b5e173ed 100644
--- a/content/browser/service_worker/service_worker_cache_storage_manager_unittest.cc
+++ b/content/browser/service_worker/service_worker_cache_storage_manager_unittest.cc
@@ -12,7 +12,6 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_browser_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
-#include "net/disk_cache/simple/simple_backend_impl.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "storage/browser/blob/blob_storage_context.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -53,12 +52,6 @@ class ServiceWorkerCacheStorageManagerTest : public testing::Test {
 
   virtual void TearDown() OVERRIDE {
     base::RunLoop().RunUntilIdle();
-    disk_cache::SimpleBackendImpl::FlushWorkerPoolForTesting();
-    base::RunLoop().RunUntilIdle();
-    cache_manager_.reset();
-    base::RunLoop().RunUntilIdle();
-    disk_cache::SimpleBackendImpl::FlushWorkerPoolForTesting();
-    base::RunLoop().RunUntilIdle();
   }
 
   virtual bool MemoryOnly() { return false; }