Create a secondary file thread, FILE_USER_BLOCKING...

content/browser/appcache/chrome_appcache_service_unittest.cc

 // Copyright (c) 2011 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/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/scoped_temp_dir.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/appcache/chrome_appcache_service.h"
@@ skipping 22 matching lines @@
 
 namespace appcache {
 
 class ChromeAppCacheServiceTest : public testing::Test {
  public:
   ChromeAppCacheServiceTest()
       : message_loop_(MessageLoop::TYPE_IO),
         kProtectedManifestURL(kProtectedManifest),
         kNormalManifestURL(kNormalManifest),
         kSessionOnlyManifestURL(kSessionOnlyManifest),
-        db_thread_(BrowserThread::DB, &message_loop_),
         file_thread_(BrowserThread::FILE, &message_loop_),
+        file_user_blocking_thread_(
+            BrowserThread::FILE_USER_BLOCKING, &message_loop_),
         cache_thread_(BrowserThread::CACHE, &message_loop_),
         io_thread_(BrowserThread::IO, &message_loop_) {
   }
 
  protected:
   scoped_refptr<ChromeAppCacheService> CreateAppCacheService(
       const FilePath& appcache_path,
       bool init_storage);
   void InsertDataIntoAppCache(ChromeAppCacheService* appcache_service);
 
   MessageLoop message_loop_;
   ScopedTempDir temp_dir_;
   const GURL kProtectedManifestURL;
   const GURL kNormalManifestURL;
   const GURL kSessionOnlyManifestURL;
 
  private:
-  BrowserThreadImpl db_thread_;
   BrowserThreadImpl file_thread_;
+  BrowserThreadImpl file_user_blocking_thread_;
   BrowserThreadImpl cache_thread_;
   BrowserThreadImpl io_thread_;
 };
 
 scoped_refptr<ChromeAppCacheService>
 ChromeAppCacheServiceTest::CreateAppCacheService(
     const FilePath& appcache_path,
     bool init_storage) {
   scoped_refptr<ChromeAppCacheService> appcache_service =
       new ChromeAppCacheService(NULL);
@@ skipping 108 matching lines @@
   EXPECT_TRUE(origins.find(kNormalManifestURL.GetOrigin()) == origins.end());
   EXPECT_TRUE(origins.find(kSessionOnlyManifestURL.GetOrigin()) ==
               origins.end());
 
   // Delete and let cleanup tasks run prior to returning.
   appcache_service = NULL;
   message_loop_.RunAllPending();
 }
 
 }  // namespace appcache