Open the LoginDatabase on the DB thread, not the UI thread.

components/password_manager/core/browser/password_store_default_unittest.cc

 // Copyright (c) 2012 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/basictypes.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
@@ skipping 27 matching lines @@
   MOCK_METHOD1(OnLoginsChanged,
                void(const PasswordStoreChangeList& changes));
 };
 
 }  // anonymous namespace
 
 class PasswordStoreDefaultTest : public testing::Test {
  protected:
   void SetUp() override {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
-    login_db_.reset(new LoginDatabase());
-    ASSERT_TRUE(login_db_->Init(temp_dir_.path().Append(
-        FILE_PATH_LITERAL("login_test"))));
   }
 
   void TearDown() override { ASSERT_TRUE(temp_dir_.Delete()); }
 
+  base::FilePath test_login_db_file_path() const {
+    return temp_dir_.path().Append(FILE_PATH_LITERAL("login_test"));
+  }
+
   base::MessageLoopForUI message_loop_;
-  scoped_ptr<LoginDatabase> login_db_;
   base::ScopedTempDir temp_dir_;
 };
 
 ACTION(STLDeleteElements0) {
   STLDeleteContainerPointers(arg0.begin(), arg0.end());
 }
 
 TEST_F(PasswordStoreDefaultTest, NonASCIIData) {
   scoped_refptr<PasswordStoreDefault> store(new PasswordStoreDefault(
       base::MessageLoopProxy::current(),
       base::MessageLoopProxy::current(),
-      login_db_.release()));
+      test_login_db_file_path()));
   store->Init(syncer::SyncableService::StartSyncFlare());
 
   // Some non-ASCII password form data.
   static const PasswordFormData form_data[] = {
     { PasswordForm::SCHEME_HTML,
       "http://foo.example.com",
       "http://foo.example.com/origin",
       "http://foo.example.com/action",
       L"มีสีสัน",
       L"お元気ですか?",
@@ skipping 25 matching lines @@
 
   STLDeleteElements(&expected_forms);
   store->Shutdown();
   base::MessageLoop::current()->RunUntilIdle();
 }
 
 TEST_F(PasswordStoreDefaultTest, Notifications) {
   scoped_refptr<PasswordStoreDefault> store(new PasswordStoreDefault(
       base::MessageLoopProxy::current(),
       base::MessageLoopProxy::current(),
-      login_db_.release()));
+      test_login_db_file_path()));
   store->Init(syncer::SyncableService::StartSyncFlare());
 
   PasswordFormData form_data =
   { PasswordForm::SCHEME_HTML,
     "http://bar.example.com",
     "http://bar.example.com/origin",
     "http://bar.example.com/action",
     L"submit_element",
     L"username_element",
     L"password_element",
@@ skipping 43 matching lines @@
   // Deleting the login should trigger a notification.
   store->RemoveLogin(*form);
   base::MessageLoop::current()->RunUntilIdle();
 
   store->RemoveObserver(&observer);
   store->Shutdown();
   base::MessageLoop::current()->RunUntilIdle();
 }
 
 }  // namespace password_manager