Fix HotwordServiceTest under ubsan: no more vcalls on garbage.

chrome/browser/search/hotword_service_unittest.cc

 // Copyright 2014 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 "chrome/browser/search/hotword_service.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 216 matching lines @@
   SetApplicationLocale(profile(), "en");
   hotword_service->SetPreviousLanguagePref();
 
   // Now a locale is set, but it hasn't changed.
   EXPECT_FALSE(hotword_service->ShouldReinstallHotwordExtension());
 
   SetApplicationLocale(profile(), "fr_fr");
 
   // Now it's a different locale so it should uninstall.
   EXPECT_TRUE(hotword_service->ShouldReinstallHotwordExtension());
+
+  base::MessageLoop::current()->RunUntilIdle();
 }
 
 TEST_P(HotwordServiceTest, PreviousLanguageSetOnInstall) {
   InitializeEmptyExtensionService();
   service_->Init();
 
   HotwordServiceFactory* hotword_service_factory =
       HotwordServiceFactory::GetInstance();
 
   MockHotwordService* hotword_service = static_cast<MockHotwordService*>(
@@ skipping 198 matching lines @@
 
   // Bypass hardware check.
   base::CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalHotwordHardware);
   EXPECT_TRUE(hotword_service->IsAlwaysOnEnabled());
 
   // Disable.
   profile()->GetPrefs()->SetBoolean(prefs::kHotwordAlwaysOnSearchEnabled,
                                     false);
   EXPECT_FALSE(hotword_service->IsAlwaysOnEnabled());
+  base::MessageLoop::current()->RunUntilIdle();
 }
 
 TEST_P(HotwordServiceTest, IsSometimesOnEnabled) {
   InitializeEmptyExtensionService();
   service_->Init();
   HotwordServiceFactory* hotword_service_factory =
       HotwordServiceFactory::GetInstance();
 
   MockHotwordService* hotword_service = static_cast<MockHotwordService*>(
       hotword_service_factory->SetTestingFactoryAndUse(
@@ skipping 29 matching lines @@
   EXPECT_FALSE(hotword_service->IsSometimesOnEnabled());
 
   // Set pref.
   profile()->GetPrefs()->SetBoolean(prefs::kHotwordSearchEnabled, true);
   EXPECT_FALSE(hotword_service->IsSometimesOnEnabled());
 
   // Disable always-on.
   profile()->GetPrefs()->SetBoolean(prefs::kHotwordAlwaysOnSearchEnabled,
                                     false);
   EXPECT_FALSE(hotword_service->IsSometimesOnEnabled());
+  base::MessageLoop::current()->RunUntilIdle();
 }
 
 TEST_P(HotwordServiceTest, AudioHistorySyncOccurs) {
   InitializeEmptyExtensionService();
   service_->Init();
 
   HotwordServiceFactory* hotword_service_factory =
     HotwordServiceFactory::GetInstance();
 
   MockHotwordService* hotword_service = static_cast<MockHotwordService*>(
@@ skipping 10 matching lines @@
   hotword_service->SetAudioHistoryHandler(audio_history_handler);
   EXPECT_EQ(1, audio_history_handler->GetAudioHistoryCalls());
   // We expect the next check for audio history to be in the queue.
   EXPECT_EQ(base::TimeDelta::FromDays(1),
             test_task_runner->NextPendingTaskDelay());
   EXPECT_TRUE(test_task_runner->HasPendingTask());
   test_task_runner->RunPendingTasks();
   EXPECT_EQ(2, audio_history_handler->GetAudioHistoryCalls());
   EXPECT_TRUE(test_task_runner->HasPendingTask());
   test_task_runner->ClearPendingTasks();
+  base::MessageLoop::current()->RunUntilIdle();
 }