Ensure tests have an active task runner

chrome/browser/ui/autofill/account_chooser_model_unittest.cc

Index: chrome/browser/ui/autofill/account_chooser_model_unittest.cc
diff --git a/chrome/browser/ui/autofill/account_chooser_model_unittest.cc b/chrome/browser/ui/autofill/account_chooser_model_unittest.cc
index 39fe699bc14e0f4b8634fc3f1858ebcc9cee2fd1..e2f9b5c7f86aba481ace347c3655a30609fba111 100644
--- a/chrome/browser/ui/autofill/account_chooser_model_unittest.cc
+++ b/chrome/browser/ui/autofill/account_chooser_model_unittest.cc
@@ -8,6 +8,7 @@
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/autofill/core/browser/autofill_metrics.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -53,6 +54,7 @@ class AccountChooserModelTest : public testing::Test {
   TestAccountChooserModel* model() { return &model_; }
 
  private:
+  content::TestBrowserThreadBundle thread_bundle_;
   TestingProfile profile_;
   testing::NiceMock<MockAccountChooserModelDelegate> delegate_;
   TestAccountChooserModel model_;