Ensure tests have an active task runner

chrome/browser/download/download_target_determiner_unittest.cc

Index: chrome/browser/download/download_target_determiner_unittest.cc
diff --git a/chrome/browser/download/download_target_determiner_unittest.cc b/chrome/browser/download/download_target_determiner_unittest.cc
index 5a0008b27aa2e4d332de5708331c641429964bf0..75062efb2561fa32277dfeb22745ee9c1764925a 100644
--- a/chrome/browser/download/download_target_determiner_unittest.cc
+++ b/chrome/browser/download/download_target_determiner_unittest.cc
@@ -2015,13 +2015,13 @@ class DownloadTargetDeterminerTestWithPlugin
       : old_plugin_service_filter_(NULL) {}
 
   virtual void SetUp() override {
+    DownloadTargetDeterminerTest::SetUp();
     content::PluginService* plugin_service =
         content::PluginService::GetInstance();
     plugin_service->Init();
     plugin_service->DisablePluginsDiscoveryForTesting();
     old_plugin_service_filter_ = plugin_service->GetFilter();
     plugin_service->SetFilter(&mock_plugin_filter_);
-    DownloadTargetDeterminerTest::SetUp();
   }
 
   virtual void TearDown() override {