Componentize component_updater: Replace content::BrowserThread usage with task runners

chrome/browser/component_updater/test/crx_downloader_unittest.cc

Index: chrome/browser/component_updater/test/crx_downloader_unittest.cc
diff --git a/chrome/browser/component_updater/test/crx_downloader_unittest.cc b/chrome/browser/component_updater/test/crx_downloader_unittest.cc
index 1612861b0d231e7a0516bced622d4ccf4ec114fc..f8fe0ab498bfc4606e013bf4f0a5e024d47e8c8b 100644
--- a/chrome/browser/component_updater/test/crx_downloader_unittest.cc
+++ b/chrome/browser/component_updater/test/crx_downloader_unittest.cc
@@ -114,7 +114,8 @@ void CrxDownloaderTest::SetUp() {
   crx_downloader_.reset(CrxDownloader::Create(
       false,  // Do not use the background downloader in these tests.
       context_.get(),
-      blocking_task_runner_));
+      blocking_task_runner_,
+      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE)));
   crx_downloader_->set_progress_callback(progress_callback_);
 }